These 4" x 2" x 2" white corrugated mailers are built from ECT-32-B single-wall corrugated board and engineered as a one-piece self-locking design that folds and closes without tape, glue, or staples — eliminating a consumable from the packing station entirely.

The fold-over construction creates reinforced double walls on the front and sides, targeting the surfaces most exposed to crush forces during transit. That added rigidity makes these mailers well-suited for e-commerce fulfillment, subscription box operations, cosmetics and beauty brands, and specialty retail distributors shipping small, lightweight goods.

Each unit weighs approximately 0.057 lbs, keeping actual and dimensional weight minimal for postage-sensitive shipments. The white exterior delivers a clean, professional appearance for customer-facing parcels. These mailers are parcel-friendly and sold in bundles of 50.