Self-Sealing Poly Mailer (2.35 MIL) Brand: FS Polyethylene mailer is water, tear, and puncture resistant for maximum protection Self-sealing, peel and stick, adhesive keeps contents secure and tamper proof Surface easily accepts ink, stamps, and labels Approved for USPS, FedEx, UPS, and DHL Size / Dimension Available: #00s / 4″ x 5″ #0s / 5″ x 6″ #1s / 6″ x 8″ #2s / 7.5″ x 9.5″ #3s / 9″ x 11″ #4s / 10″ x 12″ #5s / 12″ x 15.5″ #Hs / 13″ x 15″ #6s / 14″ x 16″ #7s / 14.5″ x 18″ #8s / 19″ x 23″ #9s / 24″ x 23″ #10s / 24″ x 35″