FAST SHIPPING: WITHIN 1 BUSINESS DAY OF RECEIVING PAYMENT-Surface made from durable premium kraft paper. -Interior padded with advanced low-density polyethylene 1/8” bubble to provide extra protection during transit. -Strong self-sealing adhesive strip. Simply peel and fold over to seal each package safely and securely. -Extra large self-seal flap for full coverage. -Cost-effective and efficient way to ship your products. -Highest quality Kraft mailers made in the U.S.A. -Approved by all shipping carriers including USPS, UPS, FedEx, and DHL.Available Sizes:#000 4 x 8 Inch (4.5 x 7)#00 5 x 10 Inch (5.5 x 9)#0 6 x 10 Inch (6.5 x 9)#1 7.25 x 12 Inch (7.25 x 11)#2 8.5 x 12 Inch (8.5 x 11)#3 8.5 x 14.5 Inch (8.5 x 13.5)#4 9.5 x 14.5 Inch (9.5 x 13.5)#5 10.5 x 16 Inch (10.5 x 15)#6 12.5 x 19 Inch (12.5 x 18)#7 14.25 x 20 Inch (14.25 x 19)