These 4 x 4 x 4 inch kraft corrugated mailers are built from ECT-32-B single wall corrugated board, delivering a crush-resistant structure with reinforced double wall protection on the front and sides. The one-piece fold-together design assembles in seconds with no tape, glue, or staples required, cutting pack station labor and consumable costs.

Their compact cubic format makes them well suited for e-commerce retailers shipping jewelry, cosmetics, and small electronics, as well as subscription box operations, retail distribution centers, and manufacturing facilities sending out replacement parts or samples. The interior footprint accommodates small, dense products that need reliable protection without oversized packaging.

At approximately 0.14 lbs, these mailers keep shipping weight low. Each bundle contains 50 mailers and ships flat, making them practical for facilities with limited storage space or high SKU counts. Bundles ship via parcel carrier.