Poly vs. Bubble vs. Paper Mailers: Which Should You Ship With?

Every order you ship starts with the same decision: what goes around the product? For most e-commerce sellers the answer is one of three envelopes - a flat poly mailer, a padded bubble mailer, or a paper mailer. They solve different problems at very different unit costs, and picking the wrong one either damages product or burns margin on protection you didn't need.

The 30-second answer

• Soft, unbreakable goods (apparel, textiles, printed goods): flat poly mailer. Cheapest per unit, lightest, most compact.
• Fragile-ish goods (electronics accessories, cosmetics, jewelry, media): bubble mailer. Built-in cushioning without a box.
• Brand-forward or sustainability-forward shipping: paper mailer. Curbside-recyclable options like honeycomb-padded kraft protect while keeping the unboxing plastic-free.

Cost per unit: what each type actually runs

Indicative ranges from our wholesale line sheet (list price down to truckload volume):

• Poly mailers: roughly $0.03 at list, down to ~$0.025/unit at truckload volume. The workhorse - a 10x13 in 2.0 mil mailer weighs under an ounce and adds essentially nothing to postage.
• Bubble mailers: ~$0.19 at list down to ~$0.16/unit. You're paying for the laminated bubble layer - still far cheaper than a box plus void fill plus tape plus labor.
• Paper mailers: ~$0.11 down to ~$0.094/unit for honeycomb-padded kraft. Sits between poly and bubble on protection, wins on recyclability.

The factor sellers forget: dimensional weight

Carriers price on the greater of actual and dimensional weight. Mailers hug the product, so they nearly always beat a box on dim weight - often by enough to drop a package into a cheaper service tier. If you currently box items that would survive in a padded mailer, the packaging saving is the small win; the postage saving is the big one. Our guide on bubble mailer sizes shows what fits in each standard size from #000 to #7.

Protection: matching the mailer to the product

Ask two questions. Can the item survive a 3-foot drop onto concrete bare? If yes, flat poly. If no - would it survive wrapped in a quarter inch of cushioning? If yes, bubble mailer or padded paper mailer. If no, you need a box. Most sellers over-protect: shipping t-shirts in bubble mailers wastes about $0.15 a unit, which at 5,000 orders a month is $9,000 a year.

Sustainability and marketplace rules

Poly mailers are recyclable only through store drop-off streams; honeycomb paper mailers go in curbside bins, which is why brands with visible sustainability commitments pay the premium. If you sell on Amazon, remember loose poly bags over 5 inches need a printed suffocation warning - covered in our FBA suffocation warning guide.

Buying at volume

All three types are factory-direct at ProntoPack - produced on partner lines in Tijuana and on the U.S. East Coast and stocked in U.S. inventory (see where your packaging is made). Volume tiers run from single pallets to truckloads: build a volume quote or order the $29 sample kit - credited in full against your first wholesale order - to put all three mailer types side by side on your own packing bench.