Mailer Envelopes, Material Polyethylene, Closure Style Self Sealing, Color White, Usable WxL 12 in x 15 1/2 in, Usable Width 12 in, Usable Length 15 1/2 in, Outside WxL 12 in x 15 1/2 in, Outside Width 12 in, Outside Length 15 1/2 in, Material Thickness 0.003 in, Post-Consumer Recyclability Store Drop-Off, With Tear Strip Yes, Pre-Printed Address Lines No, Package Quantity 500.