Corrugated mailers are super strong yet lightweight to save on postage expenses. • Perfect for shipping small, lightweight, fragile items. • Each corrugated mailer is manufactured from 32ECT B-flute oyster white corrugated. • Crush resistant mailers fold to provide double walls of protection on front and sides. • Our unique “wave rule” edge virtually eliminates paper cuts. • These one piece mailers fold together in seconds. • No tape, glue or staples needed. • All ship and store flat to save space. • Over 80 Sizes to choose from.