Aviditi M1242 Corrugated Mailers, 12" x 4" x 2", Oyster White (Pack of 50) Corrugated Mailers are super strong yet light-weight to save on postage Corrugated Mailers are manufactured from 200#/ECT-32-B oyster white corrugated Perfect for shipping small, light-weight fragile items Crush resistant mailer folds to provide double walls of protection on front and sides