‎5x5x5 inches

SIMPLE, EASY TO FOLD – These one piece shipping mailers fold in seconds, and no tape, glue or staples needed. Instructions are included;
CRUSH PROOF – Crush resistant deluxe mailers fold to provide double walls of protection on front and sides, each tab locking literature mailer is made from 200#/ECT-32-E white corrugated, super strong yet light-weight to save on postage;
BOX SIZE – The INNER size of these white mailing boxes are 5 inches length by 5 inches width by 5 inches height, The outer size is 5.25 x 5.25 x 5.5 inches;