Available Sizes:#1 7.25 x 12 Inch (7.25 x 11) Easy to use: self-sealing, adhesive and easy to be peeledSelf-sealingFully laminated water proof Poly materialMailers are plain, no printing or branding outsideLightweight to save on postageStrong seams with fins on two sides and a seamless bottom provides maximum protection. Surface easily accepts ink, stamps, and labels. Approved by USPS, FedEx, UPS, and DHL.