Mailer Envelopes, Material Chipboard, Mailer Type Flat, Closure Style Tab Locking, Color White, Usable WxL 9 in x 11 in, Usable Width 9 in, Usable Length 11 in, Outside WxL 9 in x 11 1/2 in, Outside Width 9 in, Outside Length 11 1/2 in, Material Thickness 0.028 in, Post-Consumer Recyclability 97 Percent, With Tear Strip No, Pre-Printed Address Lines No, Package Quantity 100.