These 7 3/8 x 7 3/8 x 1 3/8 inch white literature mailers are constructed from ECT-32-B single wall corrugated board and feature an integrated tab-lock closure that secures without tape, glue, or additional supplies. The result is a self-contained mailer that assembles quickly and consistently at the pack station.

The shallow 1 3/8" depth and square footprint make these mailers well-suited for documents, photo prints, sample cards, media discs, promotional inserts, and other flat or low-profile items. They are commonly used in e-commerce fulfillment, print distribution, direct mail operations, and B2B sample shipping where rigid protection and a clean exterior presentation matter.

White corrugated construction gives each mailer a professional appearance appropriate for both retail and wholesale distribution channels. Mailers arrive flat for compact storage. Sold in bundles of 50, making them practical for regular replenishment in active fulfillment environments.