How to Choose Poly Mailers for Ecommerce That Work

If you want to figure out how to choose poly mailers for ecommerce, start here: a light product can still arrive wrecked if the mailer is too thin, too big, or sealed badly. I watched that happen on a factory floor in Dongguan, where a cheap 2.5 mil film split right along the side seam after a few ugly test drops. The product inside was a soft hoodie. Nothing fancy. Still got ruined. That was a $0.19 bag turning into a $14 replacement headache. Classic.

Poly mailers are flexible plastic shipping envelopes used for apparel, soft goods, documents, and other non-fragile ecommerce orders. They’re popular because they usually cost less than boxes, weigh almost nothing, and pack faster. But how to choose poly mailers for ecommerce is not about grabbing the cheapest option and calling it done. The right mailer has to match the product, the shipping lane, and the brand experience you want customers to feel when they open the package. Otherwise you’re just buying trouble in a thin plastic coat. In Guangdong, a plain white 10 x 13 inch bag can cost as little as $0.08 per unit at 10,000 pieces, while a printed version might land closer to $0.15 per unit for 5,000 pieces once you include setup and freight.

I’ve spent enough time in packaging negotiations to know what most store owners miss: they focus on unit price and ignore the full shipping picture. Then they wonder why postage creeps up, fulfillment staff hate the bags, or a branded order shows up looking like it survived a dog fight. So here’s the clean version of how to choose poly mailers for ecommerce: size, thickness, closure, print, sustainability claims, and total landed cost. Those six things decide whether your mailer helps you or quietly bleeds money. I learned that after a three-hour supplier meeting in Shenzhen where the “same spec” bag turned out to be 12 microns thinner than the sample.

How to Choose Poly Mailers for Ecommerce: What Most Stores Miss

I was once at a packaging plant near Shenzhen where the sales rep kept pushing a lower-priced film because it “looked the same” as the better one. We ran the seam test on both. The cheaper bag failed first, and not by a little. It split in a neat little line as soon as we loaded a 1.2 kg stack of folded tees inside. That’s the part most buyers never see. A mailer can look fine on a screen and still fail in real packing conditions. How to choose poly mailers for ecommerce starts with testing, not wishful thinking. I wish “looks similar” paid for replacements. It doesn’t. On the quote sheet, the cheaper bag was only $0.012 less per unit. After 300 damaged orders, that tiny difference got very expensive, very fast.

In plain English, a poly mailer is a thin plastic shipping envelope, usually made from polyethylene film. Some are plain. Some are printed with logos, brand colors, or warning text. Some include bubble lining or gusseted sides for extra space. They’re commonly used for T-shirts, leggings, socks, accessories, and subscription items that don’t need a rigid box. If you sell fragile glass, liquids, or anything with sharp corners, stop pretending a poly bag is magic. It isn’t. Standard mailers usually run 2.5 mil to 4 mil, while padded or bubble-lined versions can be closer to 4.5 mil equivalent protection depending on the structure.

Why do they matter so much? Because they help reduce dimensional weight, which carriers love charging for. A flat package often costs less to ship than a box with empty air inside. They also speed up packing. One person can seal and label a bag in seconds, which matters when you’re pushing 800 orders a day and every extra 12 seconds becomes payroll. And if you choose custom printed mailers, the package itself becomes part of the brand story instead of a blank plastic shrug. I’ve seen a 300-person fulfillment center in Yiwu shave 47 minutes off a morning shift just by switching from box assembly to pre-sized poly bags.

“The cheapest mailer on paper is often the most expensive one in practice.” That’s what I told a fashion client after they burned through 2,000 bags with weak adhesive and paid for 73 reships in one month.

Here’s the real starting point for how to choose poly mailers for ecommerce: decide what the package must survive. A local parcel run is not the same as a cross-country lane with conveyor belts, sorting drops, and a driver tossing sacks around at 6 a.m. The best mailer is not the cheapest one. It’s the one that protects the product, fits the SKU, and doesn’t blow up your shipping cost. For a lane from Suzhou to Chicago, I’d want a stronger seal than I’d use for regional shipping inside California. Different route. Different abuse.

Before you buy anything, map your decision areas:

• Size — fit the product without too much empty space.
• Thickness — enough puncture resistance for the item and carrier route.
• Closure — adhesive that stays sealed under real handling.
• Print — plain, logo-only, or full custom artwork.
• Sustainability — recycled content, recyclability claims, and proof.
• Shipping cost — postage, storage, and replacement risk.

If you want to browse packaging formats while you compare options, our Custom Packaging Products page is a good starting point. And if you already know you need branded shipping bags, look at our Custom Poly Mailers line. That saves time. Time is money. Packaging people say that a lot because it keeps being true. A custom poly mailer order in a place like Dongguan or Ningbo usually needs a printed proof, film confirmation, and carton spec before the factory starts cutting.

How Poly Mailers Work in Ecommerce Shipping

At the simplest level, poly mailers work like this: you place the product inside, peel the adhesive strip, press the flap closed, apply the shipping label, and send it out. That’s the basic flow. If you’re using custom Printed Poly Mailers, the customer sees the brand before they ever touch the product. If you’re using automated packing, the mailer’s opening width, seal quality, and label adhesion matter even more because a slow bag can jam the whole line. And yes, that happens right when the warehouse is already loud, hot, and somehow out of tape. A well-made bag can be packed in 6 to 8 seconds by a trained picker; a badly designed one can take 15 seconds and still fail at the seal.

Most standard mailers have an outer film layer, an adhesive strip, and a sealed side seam. Some include gussets, which give the bag more depth. Others use bubble lining for a bit of impact resistance. I’ve seen apparel brands switch from boxes to padded poly mailers and cut shipping weight by 18% on average. That’s not a tiny change. On 20,000 orders, it’s real money. Probably more than your office espresso budget, unless your office is very fancy and very unhinged. One client in Los Angeles saved about $3,600 a month in postage after moving 12,000 monthly orders from 9 x 6 x 4 inch cartons to 10 x 13 inch mailers.

Poly mailers are especially useful for soft goods and low-fragility products:

• T-shirts and sweatshirts
• Leggings, sportswear, and underwear
• Scarves, hats, and accessories
• Books, flat paper goods, and documents
• Light subscription items and promo kits

They are not the right call for every product. If the item has a glass jar, metal edges, sharp hardware, or a liquid component, I’d rather use a box with internal protection. A customer who opens a crushed package and finds damaged merchandise is not impressed by your cost savings. They are annoyed. Then they email support. Then they leave a review. Then finance asks why returns are up. Fun times. A rigid candle tin shipped in a 2.5 mil mailer almost always ends badly; a 44 lb edge-load carton with inserts is the better move.

For shipping validation, good suppliers will mention tests tied to ASTM or ISTA standards. That matters. ISTA packaging tests simulate drop, vibration, and compression conditions. If a supplier can’t explain what their film spec means or how seam strength was verified, I get suspicious fast. You should too. You can read more about shipping and package testing standards through the International Safe Transit Association. In my experience, a supplier in Shanghai that can quote ASTM D5276 drop testing usually knows their stuff better than one who just sends photos of a shiny bag.

How to Choose Poly Mailers for Ecommerce: Size, Thickness, and Material

If you want to get serious about how to choose poly mailers for ecommerce, size comes first. Not the “close enough” size. The actual fit. I’ve seen merchants order mailers that were 4 inches too tall because they guessed from the product photo instead of measuring folded dimensions. The result was slack plastic, ugly presentation, and wasted shipping space. Oversized bags don’t just look sloppy. They can also shift more in transit and make the package feel cheap before the customer even opens it. A 10 x 13 inch bag is common for folded tees, while 12 x 15.5 inch or 14 x 17 inch options are better for hoodies, fleece, or multi-item bundles.

My rule is simple: measure the product after it’s packed the way it will ship. Fold the garment. Add the insert if you use one. Then choose a mailer with just enough room for easy loading and a clean seal. For a folded T-shirt, that might mean a 10 x 13 inch bag. For a hoodie, maybe 12 x 15.5 or 14 x 17 depending on how bulky the fabric is. If you sell multi-item bundles, the dimensions can change fast. That’s why sample testing beats guessing every time. I’m not saying measure every item with a ruler like a maniac. I am saying don’t wing it. In a Guangzhou factory audit, I watched three sizes get rejected because they were 8 mm too short for the brand’s folded joggers.

Thickness is the next decision. You’ll hear people talk about mils or gauge. That’s film thickness. Thinner film is cheaper and lighter, but it can stretch, puncture, or split at the seams if the order is dense or has sharp edges like zippers and buttons. Thicker film costs more, but it usually handles abuse better. For lightweight apparel, a standard film may be enough. For heavier bundles or long shipping lanes, I usually want a stronger gauge. A 2.5 mil mailer may be fine for a single tee shipped locally, while a 3.5 to 4 mil bag makes more sense for hoodies or international transit through hubs like Shenzhen, Hong Kong, and Memphis.

Material choice matters more than the marketing department wants to admit. Most poly mailers are polyethylene-based. Some include recycled content. Some are marketed as compostable, which needs a closer look because not every “compostable” claim performs the same way outside a controlled facility. I always ask for documentation. If a supplier says recycled content is included, I want the percentage and the source. If they say recyclable, I want to know where and under what conditions. Packaging claims get fuzzy fast when nobody asks for paperwork. A clear spec sheet should tell you whether the film is LDPE, whether it contains 30% post-consumer recycled resin, and whether the seal strip is permanent or tamper-evident.

Mailer Type	Typical Use	Strength	Branding	Relative Cost
Standard plain poly mailer	Light apparel, soft goods	Moderate	Low	Lowest
Heavy-gauge poly mailer	Dense bundles, longer lanes	High	Low to medium	Mid
Custom printed poly mailer	Branded ecommerce orders	Depends on spec	High	Mid to high
Bubble-lined mailer	Semi-fragile non-glass items	Higher impact protection	Medium	Higher

Print quality is its own headache. Some films hold ink beautifully. Others make the artwork look dull, hazy, or slightly misregistered. I remember a negotiation with a supplier in Ningbo where the sample looked great under showroom lighting, but the production roll showed faint banding when we ran a solid navy background. That client wanted black logo printing on a white mailer, so we switched film finish and solved it. The lesson? How to choose poly mailers for ecommerce includes checking how the material handles print, not just how it handles weight. A matte finish can hide scuffs better than glossy film, especially on the last 200 bags in a carton.

For example, a lightweight apparel brand may use a 10 x 13 inch mailer at 2.5 mil thickness with simple one-color print. A dense multi-item bundle may need 3.5 to 4 mil film, a wider opening, and stronger adhesive. If you’re packing items with inner packaging, such as a rigid product box inside the mailer, test the corners. Sharp corners are seam killers. I’ve seen more busted bags from cardboard edges than from product weight itself. A 350gsm C1S artboard insert, for example, is beautiful in a box and a menace inside a thin bag unless the mailer is sized up properly.

How to Choose Poly Mailers for Ecommerce Based on Cost and Pricing

People love asking for “Cheap Poly Mailers.” Sure. I love cheap things too. Then I like them less when they cost me postage, reprints, reships, and angry emails. The real answer to how to choose poly mailers for ecommerce is to evaluate total cost, not just unit cost. A bag that saves $0.02 each but adds 6 grams of weight and causes 1% more damage is not really saving you money. It’s hiding the bill in a different drawer. A cheaper quote from a factory in Dongguan might look great until you realize the adhesive strip is 3 mm narrower and the film is 0.2 mil thinner.

Here’s the cost stack I look at:

1. Unit price — what the bag costs per piece at your quantity.
2. Printing setup — plates, tooling, or screen setup fees.
3. Shipping weight — every extra gram affects postage.
4. Storage space — oversized cartons take room in the warehouse.
5. Labor time — harder-to-use bags slow packing.
6. Damage rate — replacements and customer service costs.

In supplier quotes, stock bags are usually cheaper upfront. Custom sizes and custom prints cost more because the factory has to run specific film widths, print plates, and sometimes separate packaging cartons. MOQ, or minimum order quantity, matters a lot. Small runs often carry a higher unit price. Larger orders can bring that price down sharply, especially if you standardize the size and print across multiple SKUs. I’ve seen quotes move from roughly $0.18 per unit at 5,000 pieces to under $0.10 at 30,000 pieces for the same style, same size, same film spec. That’s not magic. That’s volume. In Shenzhen, a two-color print might add $120 to $280 in plate fees, while a 1-color print could stay on the low end if the artwork is simple.

That doesn’t mean you should automatically buy the biggest run possible. I’ve watched brands get stuck with 40,000 mailers after a rebrand or packaging refresh. Suddenly the logo is outdated and the “savings” become dead inventory. Honestly, I think buyers often over-order because a lower unit price feels like a win. But if the design changes, the SKU mix shifts, or the carrier profile changes, you’ve just bought a warehouse problem. A client in Brooklyn once saved $1,100 on unit cost and lost $4,800 in obsolete stock six months later. Great trade, if you enjoy inventory pain.

When comparing suppliers, ask for the same exact specs. Same size. Same thickness. Same print coverage. Same closure style. Same carton pack-out. Otherwise, you’re comparing apples to whatever someone found under the desk. I want the quote to say 10 x 13 inches, 3 mil, 1-color black print, 100 pieces per inner carton, 20 cartons per master case, FOB Shenzhen. That level of detail keeps people honest.

Good suppliers will also help you understand whether the mailer is plain stock, semi-custom, or fully custom. Stock can move fast and costs less. Semi-custom might use a standard size with your logo. Fully custom mailers give you full control, but they cost more and usually need longer lead times. If you’re building packaging around a strong brand, custom can be worth it. If you’re still testing product-market fit, plain bags may be the smarter move for now. A stock poly mailer in a U.S. warehouse can ship in 3 to 5 business days; a custom printed order out of Ningbo usually takes longer because of proofing and production.

For companies exploring broader packaging decisions, our Custom Packaging Products page covers more than mailers, which helps if you’re balancing shipping bags with tissue, stickers, boxes, or inserts. The full package matters. Customers notice consistency faster than most founders expect. A coordinated mailer, insert, and label set can make a $22 order feel more deliberate than a $60 order in random packaging.

Step-by-Step Process and Timeline for Ordering Poly Mailers

Buying packaging without a process is how people end up in emergency mode on a Friday afternoon. I’ve lived that one. A client once called me because their last carton of mailers had 11 bags left and 4,200 orders scheduled for the next week. Great planning. Truly inspiring. If you want to know how to choose poly mailers for ecommerce and actually execute it, use a simple ordering flow. The whole process can take 2 to 6 weeks depending on whether you buy stock or custom, and whether the factory is in Dongguan, Shenzhen, or a coastal export hub like Ningbo.

Step 1: Audit products and shipping methods

List your top-selling SKUs, folded dimensions, average order weight, and the carrier lanes you ship most often. A product shipping regionally is not the same as one crossing multiple hubs. If your order is a soft cotton tee, your needs are different from a hoodie with a cardboard thank-you card and a return slip. Start with data, not vibes. If 70% of your orders go to California and Texas, your damage profile will look different than a brand shipping mostly to Alaska, New York, and Canada.

Step 2: Request samples and test fit

Ask for 2 to 3 sample options. Pack one item. Pack two items. Pack the product with inserts. Then shake it, seal it, label it, and see what happens. Test tear resistance, seal strength, scuff resistance, and whether the label sticks properly to the surface. If the adhesive fails after 20 minutes in a warm warehouse, that matters. If the print smudges when someone rubs it with a sleeve, that matters too. I like to run sample checks in a 30°C room if possible, because heat changes how glue behaves. A bag that looks perfect at 21°C can turn annoying at 30°C.

Step 3: Approve artwork carefully

Print placement can be off by 2 to 3 mm and still technically pass production. That means your logo needs proper margins. Check bleed, safe area, and color expectations. If you want exact brand consistency, ask for a printed proof or drawdown. A screen preview is not the same as film on a production line. Not even close. For custom mailers, most factories in Guangdong will send a digital proof first, then a physical sample if you request one. Expect the proof cycle to take 2 to 4 business days depending on how fast you answer.

Step 4: Get a quote with all spec details

A real quote should include material, size, thickness, print method, order quantity, carton pack-out, lead time, and shipping cost. If a supplier gives you a single number with no detail, I’d be cautious. Detail keeps everyone honest. It also helps you compare vendors without getting fooled by a low headline price and sneaky extras buried in the fine print. A good quote might read: 10 x 13 inch LDPE mailer, 3 mil, 1-color print, $0.15 per unit for 5,000 pieces, FOB Shenzhen, 100 bags per carton, 12-15 business days from proof approval.

Step 5: Place the order and protect your inventory plan

Once the proof is approved, production begins. Stock orders can move quickly because the factory already has inventory. Custom orders take longer because film extrusion, printing, curing, slitting, and packaging all have to happen in sequence. Typical lead times vary by supplier, but a custom run often needs enough time for sampling, approval, and manufacturing before freight even starts. Build a reorder point into your system so you are not scrambling when the last pallet disappears. In practical terms, that means placing the next order when you still have 30 to 45 days of stock left, not when the warehouse shelf is bare.

Timeline reality check: stock mailers can ship fast, but custom work needs patience. I’ve seen 8-day stock shipments and 4-week custom runs, and that’s before any port delays or holiday congestion. If a supplier promises the moon in record time, ask how. Very carefully. Usually the answer is either vague or expensive. A normal custom order from proof approval to dispatch is typically 12-15 business days in a good factory in Dongguan or Xiamen, plus 4 to 18 days for ocean or air freight depending on route.

For brands that want product-specific guidance while comparing packaging formats, our Custom Poly Mailers page is useful because it narrows the field to the right category instead of making you sort through unrelated packaging.

Common Mistakes When Choosing Poly Mailers for Ecommerce

The biggest mistake is picking by price alone. I know, shocking. A bag can be $0.01 cheaper and still cost more once you account for postage, damage, and customer dissatisfaction. How to choose poly mailers for ecommerce means looking past the unit quote and asking what happens during real shipping. If the cheap bag fails 2% of the time and the better bag fails 0.3% of the time, the “savings” disappear fast once reships hit your P&L.

Another common problem is buying a mailer that is too large. That extra empty space wastes material and makes the package look lazy. It can also shift the item around inside the bag, which increases abrasion. If the package arrives wrinkled, bulky, or oddly puffed up, it doesn’t say “premium.” It says someone guessed. I’ve seen a 14 x 20 inch bag used for a folded tee and a postcard. That’s not a mailer. That’s a regret balloon.

Closure strength gets ignored all the time. A weak adhesive strip might hold in a warehouse, then open halfway through transit when the film flexes in a hot trailer. I’ve seen bags pop open at the seam because the glue failed during a long route and the package got squeezed in a sorting center. That’s an expensive lesson. And not a fun one. Ask for peel tests and look for consistent seal strength after a 24-hour rest period, not just immediately after closing.

Sharp edges are another trap. Product boxes, zippers, buttons, and hardware can punch through thin film. If your items have corners or hard inserts, consider a heavier gauge or a padded style. Don’t assume the mailer can handle it just because the product is “not fragile.” Carriers have a different opinion. A 350gsm C1S artboard box insert inside a 2.5 mil mailer is asking for a split seam if the pack isn’t sized correctly.

Then there’s the sample issue. Skipping test orders is lazy and costly. The factory may show you a perfect-looking mockup. Great. Does it seal properly? Does the ink scratch? Does the label stay on? Does the material scuff when it rubs against another carton? You only find out after a test run. That’s why samples matter. I usually want 20 to 30 test pieces, not one vanity sample that lives on a desk and never gets abused.

And please, don’t overclaim sustainability. If you say recycled content, know the percentage. If you say recyclable, know the local end-of-life reality. The U.S. EPA has useful packaging and waste guidance at EPA.gov, and FSC has solid certification information at FSC.org for paper-based components in broader packaging systems. For plastic mailers, documentation still matters. Green-sounding words are not proof. A supplier in Wenzhou once pitched “eco mailers” with no resin data and no test report. That is not a claim. That is a shrug.

I had one brand try to market their mailers as “eco-friendly” because they were thinner. Thinner is not the same as better. Sometimes thinner just means more likely to fail. That’s not sustainability. That’s a return label with better PR. If the bag breaks in transit and you ship a replacement in another plastic bag, the environmental story gets embarrassing very quickly.

Expert Tips for Choosing the Right Poly Mailers

If you want to get better at how to choose poly mailers for ecommerce, stop thinking in single-SKU terms and build a test matrix. One bag size for one tee is easy. Real stores sell bundles, gift sets, seasonal items, and return replacements. Test one-item packs, two-item packs, and any version with inserts or cards. That’s where failure usually shows up. I like to test at least 3 scenarios: light order, heavy order, and awkward order. The awkward one is usually the one that breaks.

I usually recommend going one step stronger than you think you need if your fulfillment team packs quickly or your lanes are long. Fast packing creates more stress on the adhesive and seam. Long carrier routes create more handling. A slightly stronger film can save you from a lot of customer complaints. Not always, but often enough that I’m comfortable saying it. If your team is packing 1,200 orders per shift, a 3 mil bag can be a safer choice than a 2.5 mil bag even if the unit price jumps by $0.01.

Use branding strategically. A full-coverage custom print looks nice, but a simple logo on a clean mailer may do 80% of the job for 40% of the cost. In one client meeting, we cut their print budget by moving from full ink coverage to a single-color logo and one short brand line. Their unit cost dropped, the mailers still looked polished, and they didn’t have to reorder art every time a campaign changed. Smart, not flashy. I like that. If your print area is 8 x 10 inches instead of full bleed, you also reduce ink consumption and improve consistency.

Keep backup stock. Packaging shortages show up at the worst possible time, usually when sales are peaking and everyone’s already stressed. If your lead time is 12 to 15 business days from proof approval, don’t wait until you’re down to the final pallet. Build a reorder point and stick to it. I’d rather see a warehouse with 6 weeks of buffer than one emergency air-freighting mailers from Shenzhen on a Thursday night.

And talk to suppliers like they’re supposed to know the technical details, because they should. Ask about film spec, seam strength, print method, and carton configuration. If they only send pretty mockups and dodge the material questions, move on. Good suppliers can explain what a 3 mil bag does better than a 2.5 mil bag and why. The pretty picture is the least interesting part. A serious supplier can tell you whether their film is 100% virgin LDPE, blended with 30% recycled resin, or finished with a matte additive.

For brands trying to sort through different packaging categories, I’d recommend keeping your internal packaging standards in a simple one-page sheet. Size, thickness, artwork, approved supplier, reorder point, and packing instructions. Nothing fancy. Just enough so the next person doesn’t reinvent the wheel or order the wrong thing at 2 a.m. If you have a brand team in London and a fulfillment team in Dallas, that one page will save you from at least one ugly email thread.

Next Steps: Build Your Poly Mailer Shortlist and Test It

The smartest way to finish how to choose poly mailers for ecommerce is to build a shortlist and run tests before you commit. I’d narrow it to 2 or 3 options based on your best-selling products and your shipping profile. One option should be your baseline. One should be slightly stronger. If you want to compare branded options, include a custom print version too. Keep the test set tight, or you’ll drown in sample bags and opinions.

Then order samples. Not one sample. Multiple. Pack the actual products your team ships every day. Check the fit. Check the seal. Check the label surface. Check tear resistance. Check how the bag looks when stacked in a carton. If you use a fulfillment partner, have them test it too. Their workflow may reveal problems your desk test never will. I’ve had a perfectly fine-looking 10 x 13 bag fail because the label peeled in a humid warehouse in Miami after 18 minutes under fluorescent lights.

When the quotes come in, make sure you are comparing exact spec-to-spec numbers. Same dimensions. Same mil thickness. Same print coverage. Same order quantity. Same freight terms. Otherwise, the low quote is just a distraction. I’ve watched buyers choose a cheaper quote and later discover the quoted bag was 10% lighter, with a narrower adhesive strip and a different carton count. That is not an apples-to-apples comparison. That is a trap with stationery. Ask for the spec sheet in writing, and if the supplier can’t give you one, walk away.

Track the cost per shipped order, not only the cost per mailer. Add postage, labor time, damage rate, and replacement cost. A bag that reduces labor by 5 seconds per pack might be worth more than a bag that saves $0.01 on paper. The real metric is what the package costs you after it leaves the warehouse. On 10,000 orders a month, 5 seconds per pack equals more than 13 hours of labor. That’s not trivia. That’s payroll.

Once you decide, document the selected size, thickness, artwork specs, approved supplier, and reorder point. Future purchasing gets much easier when the standard is written down. Otherwise, every reorder turns into a mini mystery novel. I’ve seen companies burn half a day just figuring out which shade of white they ordered six months ago. Don’t be that team.

If you’re still figuring out how to choose poly mailers for ecommerce, remember this: the best bag is the one that fits your product, your shipping lane, and your brand promise without creating avoidable cost. That’s the whole job. Measure it. Test it. Compare the full landed cost. Then reorder the version that performs in real packing, not just the one that looked cheapest on a quote sheet. A decent supplier in Dongguan or Ningbo will respect that logic because they’ve seen enough failed packaging programs to know it’s the only thing that works.