Aviditi M743 Corrugated Mailer, 7″ Length x 4″ Width x 3″ Height, Oyster White (Bundle of 50) Aviditi Corrugated mailers are super strong yet light-weight to save on postage. Perfect for shipping small, light-weight fragile items. Corrugated mailers are manufactured from 200#/ECT-32-B oyster white corrugated. Crush resistant mailer folds to provide double walls of protection on front and sides. Unique “Wave-Rule” edge virtually eliminates paper cuts. Measures 7-inches length by 4-inches width by 3-inches height.