Mailer Envelopes, Material Chipboard, Mailer Type Flat, Closure Style Self Sealing, Color White, Usable WxL 11×13 1/2 in, Usable Width 11 in, Usable Length 13 1/2 in, Outside WxL 11-3/4×13-1/2 in, Outside Width 11 3/4 in, Outside Length 13 1/2 in, Material Thickness 0.02 in, Post-Consumer Recyclability 97 Percent, With Tear Strip Yes, Pre-Printed Address Lines No, Package Quantity 100.