Zoro Select M1244 12x4x4 in Literature Mailer White

White literature mailer dimensions

The Zoro Select M1244 is a white corrugated cardboard mailer with inside dimensions of 12 in by 4 in by 4 in. It uses a single B-flute wall construction rated at ECT-32-B for structural rigidity. Each unit is sold in a package quantity of 50 and is made from 100 percent post-consumer recyclable material. This product ships directly from the supplier.

Single-wall load and size limits

The single-wall design supports a maximum load capacity of 65 lb, suitable for documents, catalogues and lightweight goods. Wall thickness measures 3/16 in, which protects contents while keeping the outer footprint identical to the inner 12x4x4 in dimensions. Heavier or fragile items that exceed the 65 lb rating or require double-wall cushioning fall outside this mailer's intended use. The ECT-32-B rating defines the stacking strength for palletised shipments.

Replaces basic envelopes and oversize boxes

This mailer upgrades from unpadded envelopes that crush under stack weight and from oversized cartons that waste void fill and dimensional shipping cost. The rigid B-flute construction eliminates the need for separate stiffeners when mailing literature or flat products. The switch is worth it when shipments regularly hit the 65 lb limit or when automated sorting requires a uniform 12x4x4 in profile. Buyers needing higher crush resistance or larger interior volumes should evaluate double-wall alternatives.