These 4 x 4 x 2 inch kraft corrugated mailers are built from ECT-32-B single wall corrugated board and feature a one-piece fold-together construction that creates a double walled enclosure on the front and sides — delivering crush resistance without any tape, glue, or staples.

Their compact format and fast assembly make them well suited for high-volume pick-and-pack operations, direct-to-consumer e-commerce fulfillment, retail distribution centers, and light manufacturing shipments where consistent, reliable protection of small items is a priority.

Each mailer weighs approximately 0.096 lbs and stores flat to conserve bench and shelf space. Sold in bundles of 50 and parcel-friendly, these mailers arrive ready to integrate into existing packing workflows without additional processing.