These 4" x 4" x 1" white corrugated mailers are built from ECT-32-B single-wall corrugated board and use a one-piece fold-lock design that assembles without tape, glue, or staples. When folded, the construction creates reinforced double-layer protection along the front and sides, adding crush resistance where flat items are most vulnerable in transit.

The clean white exterior suits retail fulfillment, e-commerce shipping, direct mail, and subscription box operations where presentation at the point of unboxing matters. Jewelry, flash drives, patches, coins, and other compact items fit cleanly within the 4 x 4 x 1" interior without overpacking or void fill.

Each unit weighs approximately 0.07 lbs, keeping dimensional weight impact low across high-volume runs. Mailers fold flat for compact storage at the pack station, and each bundle contains 50 units. Ships via parcel carrier.