Poly Mailer Size Guide — Standard Courier Bag Sizes & How to Choose

Poly mailer dimensions can use different measurement conventions. For AUREN's featured mailers, inch dimensions refer to the bag body excluding the flap, while centimeter dimensions refer to the overall bag including the flap. Confirm the approved finished dimensions before ordering.

How AUREN poly mailers are measured

Inch dimensions refer to the bag body excluding the flap. Centimeter dimensions refer to the overall bag including the flap. They use different conventions and must not be treated as direct unit conversions. Confirm finished width, finished length and flap length on the approved specification.

Featured size conventions

10 x 13 in is recorded with 28 x 42 cm overall size; 12 x 15.5 in with 32 x 45 cm overall size; and 14.5 x 19 in with 38 x 52 cm overall size. Width differences require specification confirmation and are not explained on this page as tolerance, usable size or a unit conversion.

Thickness and material

Factory records list 90 µm total economy and 120 µm total heavy for these featured co-ex LDPE / LDPE mailers. Confirm whether total thickness means both bag walls combined, and confirm single-wall thickness before production approval.

Self-seal, return strip and printing

A strong permanent self-seal adhesive is standard; add a second peel-and-seal strip if customers need easy returns. Custom printing (logo, brand colour, care text) is available from low MOQs - send artwork as vector for the cleanest result.

Recycled content and compliance

PCR (post-consumer recycled) mailers help meet retailer and EU recycled-content targets. Tell us your destination market so we can match the right recycled percentage and provide the test documentation your buyer needs.

How to order

Send the finished inside size, thickness (mil or micron), colour, print (yes/no), monthly volume and destination port. We confirm an exact size match - or measure a sample you send - and quote factory-direct.

Request a wholesale quote

Send your sizes, thickness, colour and quantity — we reply with FOB pricing, samples and lead time.