These 6 x 4 x 3 inch kraft corrugated mailers are built from ECT-32-B single wall corrugated board and feature a one-piece fold-together construction that creates double-wall reinforcement along the front and sides when assembled — eliminating the need for tape, glue, or staples entirely.

The self-locking format is well suited to e-commerce fulfillment, subscription box operations, retail distribution, and any pack station where speed and consistency are priorities. Assembly takes seconds, making these mailers practical for high-throughput environments and single-operator packing alike.

Mailers ship and store flat for efficient staging in tight spaces. The lightweight kraft construction helps control dimensional weight costs on small outbound parcels. Each bundle contains 25 mailers and ships via parcel carrier.