CleverDelights 4 x 6 inch poly mailers. 4000 pack. Each ultra-strong 2 mil thick polyethylene bag is self-adhesive for your convenience. Simply peel the tape off, seal, and ship! Our premium poly envelopes are tamper and water resistant. Great for shipping and mailing. Thick and dark inner lining keeps bag contents discrete and private. Your labels and stamps will have no problem adhering to these bags. We carry poly mailers in sizes ranging from 4” x 6” to 24” x 36”. For our full selection of poly bag sizes and colors, please visit our store. Dimensions shown do not include the flap.