Poly Mailer Size Chart

Direct answer: choose poly mailer sizes by measuring the finished item after folding, grouping, inserts, labels, and closure allowance. Use a plain poly mailer for soft low-profile goods, a bubble mailer when cushioning matters, and a box or carton when the shipment needs structure.

Poly Mailer Size Selection Formula

Best route = finished item width + finished item length + closure room + bend risk + protection route + repeat buying path.

Do not choose only from the nominal item size. A good mailer fit depends on how the item loads, whether the seal is stressed, whether labels remain readable, and whether the same mailer will be reused across orders.

Poly Mailer Fit Model

Width: measure the widest finished point, including folds, grouped items, inserts, corners, and label area.
Length: include loading room, closure allowance, labels, paperwork, and any part of the item that shifts during handling.
Closure: leave enough room for the adhesive strip to close without stretching the mailer or bending the item.
Protection: compare plain poly, bubble, mailer box, and corrugated routes when bend, crush, or impact risk changes.
Repeatability: record approved size, substitute route, closure method, monthly demand, and reorder owner.

Common Poly Mailer Size Ranges

Buyer scenario	Common starting range	Fit check
Small accessories and flat parts	Small flat mailer routes	Use when the item is thin, non-fragile, and needs enough room for loading, label placement, and a clean seal.
Single soft goods and folded apparel	9.5 x 12.5 through 10 x 13	Measure the folded stack, not the garment laid flat, and leave enough closure room so the seal is not stressed.
Bulkier apparel, returns, and kits	11 x 13.5 through 14.5 x 19	Use a larger route when folds, inserts, returns paperwork, or grouped items make the common apparel sizes too tight.
Items needing cushion	Bubble mailer or padded route	Move away from a plain poly mailer when surface protection, small impacts, or rigid edges drive the decision.
Rigid, fragile, or dimensional goods	Mailer box or corrugated carton	Use a structured route when the item needs crush protection, corner protection, or presentation that a flexible mailer cannot provide.

Plain, Bubble, Box, and Carton Decision Matrix

Decision	Use this route when...	Compare another route when...
Plain poly mailer	The item is soft, low-profile, non-fragile, and does not need cushioning.	The item is rigid, fragile, sharp-edged, presentation-sensitive, or likely to bend.
Bubble mailer	The item needs surface protection or small-impact cushioning while staying mailer-friendly.	The item needs corner protection, crush protection, or a structured presentation route.
Mailer box	The item is still small but needs structure, presentation, or cleaner unboxing than a flexible mailer.	The item is soft enough that a flexible mailer protects it without creating avoidable cube.
Corrugated carton	The item is dimensional, fragile, bundled, or needs void fill and crush protection.	The shipment is a soft-good route where a mailer can reduce cube without raising damage risk.

Packrift Poly Mailer Size Routes

Use these as planning paths, not as current offer, inventory, or exact-substitute claims. Open the destination route to confirm current details before ordering.

Path	Best fit
Poly mailers collection	Use when the shipment is soft, low-profile, and does not need cushioning or crush protection.
Mailers and envelopes collection	Use when comparing poly mailers, bubble mailers, literature mailers, and envelope-style shipping paths.
Best poly mailers for shipping	Use when the buyer needs a broader decision path before choosing a size.
Bubble vs poly mailer cost	Use when cushioning, damage risk, postage weight, and pack labor need to be compared.
Poly mailer vs bubble mailer	Use when the buyer is deciding between plain flexible film and a padded mailer route.
Mailer box vs corrugated vs poly mailer	Use when a flexible mailer may not provide enough structure or customer presentation.
12 x 15.5 vs 10 x 15 poly mailers	Use when apparel, documents, or kits are close to the common 10 x 15 and 12 x 15.5 size boundary.

Reorder and Bulk Quote Workflow

Measure the finished item after folding, grouping, inserts, labels, closure allowance, and handling needs are included.
Choose the smallest route that loads cleanly without seam pressure, blocked labels, seal stress, or item bending.
Compare plain poly, bubble, mailer box, and corrugated carton routes before approving a repeat path.
Test one adjacent smaller and one adjacent larger route if the first fit is loose, tight, or awkward at the pack station.
Record approved size, format, closure, substitute route, monthly demand, and reorder or bulk quote owner.

Adjacent Size And Mailer Paths

FAQ

How do I choose a poly mailer size?

Measure the finished item after folding, grouping, inserts, labels, and closure allowance, then choose the smallest mailer that loads cleanly without stretching the seal or corners.

What size poly mailer should I use for apparel?

Start by measuring the folded apparel stack. Common apparel decisions often compare 9.5 x 12.5, 10 x 13, 11 x 13.5, and 14.5 x 19 routes, but the finished fold should control.

When should I use a bubble mailer instead of a poly mailer?

Use a bubble mailer when the item needs cushioning, surface protection, or small-impact protection that a plain flexible mailer does not provide.

When should I use a mailer box or corrugated carton instead?

Use a structured route when the item is rigid, fragile, dimensional, presentation-sensitive, or likely to be damaged by bending or compression.

When should I use reorder or bulk quote paths?

Use reorder after the approved size, format, closure, and substitute rule are documented. Use a bulk quote when several sizes, teams, or locations repeat monthly.