These 3" x 3" x 1" white corrugated mailers are built from ECT-32-B corrugated board and fold into a finished mailer without tape, glue, or staples. The one-piece self-locking construction closes securely in seconds, making them practical for high-volume packing lines where speed and consistency are priorities.

The shallow 1" depth suits jewelry, patches, pins, keychains, USB drives, trading cards, and similar compact or flat products. E-commerce sellers, subscription box operators, and retail fulfillment centers use them for direct-to-consumer shipments where a clean, damage-free presentation matters.

When assembled, the design produces double-wall panels along the front and sides, adding structural rigidity without increasing unit weight — each mailer weighs approximately 0.0484 lbs. The white exterior delivers a retail-ready appearance. Sold in bundles of 50; ships via parcel.