Mailer Envelopes, Material Chipboard, Mailer Type Flat, Closure Style Tab Locking, Color White, Usable WxL 9 in x 12 in, Usable Width 9 in, Usable Length 12 in, Outside WxL 9 3/4 in x 12 1/4 in, Outside Width 9 3/4 in, Outside Length 12 1/4 in, Material Thickness 0.028 in, Post-Consumer Recyclability 97 Percent, With Tear Strip No, Pre-Printed Address Lines No, Package Quantity 100.