13 1/2 x 3 1/2 x 3 1/2" White Corrugated Mailers

These 13 1/2 x 3 1/2 x 3 1/2 inch white corrugated mailers are built from ECT-32-B single wall corrugated board and fold into a fully closed mailer without tape, glue, or staples. The self-locking construction secures the box through the shipping process, and the one-piece design means no assembly hardware or extra materials are needed at the packing station.

The elongated format makes these mailers a practical fit for documents, rolled prints, architectural drawings, posters, cosmetic tubes, and slim retail products. The white exterior delivers a clean, neutral presentation suited to branded or retail-facing shipments, and the format is commonly used by e-commerce sellers, print shops, and catalog fulfillment operations.

When folded, the design creates double wall thickness along the front and sides for added crush resistance during transit. Each mailer weighs approximately 0.24 lbs, keeping actual and dimensional weight costs manageable at volume. Bundles contain 50 mailers and ship via parcel carrier.