BOX USA offers a large variety of die-cut corrugated cardboard mailers to choose from. BOX USA White Corrugated Cardboard Literature Mailers 11 x 10 x 4″ (L x W x H) are perfect for packing, mailing, shipping and storing documents. These one-piece corrugated mailers assemble in seconds without tape, glue or staples. Boxes are sold in bundle quantities and are shipped flat to save on storage space and reduce freight cost. Listed dimensions refer to inside usable carton space.