10″x13″ 2.5mil White/Gray Poly Mailer Bags Select your Quantity 5, 10, 25, 50, 100, 200, 500 and 1000 ea Brand New!!! Size: 10″x13″ (Width x Length) Thickness: 2.5 mil Color: White Outside, Dark Gray Inside (Discreet Mailer) Material: Polyethylene Low Density (LDPE), Waterproof UPS, FedEx and USPS approved. Tear and puncture resistant Self Sealing (approx. 2″ flap), (pressure sensitive adhesive) High Efficiency mailers are perfect for shipping lots of non-fragile items High strength seams over stuffing. 100% recyclable