21 x 27 (10 ea) Bulk Price Jumbo Size Plastic Mailing Bags - Polymailer / Packaging / Plastic Poly Bags / Shoppingmaill / Self-seal (21 x 27 inch (10 ea)) Thick Material : 0.04" Do not tear - Wide Sealing Anti-static OPP Finishing Strong adhesive force : Hot-melt Adhesives low permeability : Dual Material