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: #00 / 4" x 6" #0 / 5" x 7" #1 / 6" x 9" #2 / 7.5" x 10.5" #3 / 9" x 12" #4 / 10" x 13" #5 / 12" x 16" #H / 13" x 16" #6 / 14" x 17" #7 / 14.5" x 19" #8 / 19" x 24" #9 / 24" x 24" #10 / 24" x 36"