Mailer Envelopes, Material Poyethylene, Metalized Polyethylene, Mailer Type Insulated, Closure Style Lip and Tape, Color Silver, Usable WxL 10 1/2 in x 14 3/4 in, Usable Width 10 1/2 in, Usable Length 14 3/4 in, Outside WxL 11 in x 15 in, Outside Width 11 in, Outside Length 15 in, Mailer Number #5, Bubble Size 3/16 in, Material Thickness 0.003 in, Post-Consumer Recyclability 0 Percent, With Tear Strip No, Pre-Printed Address Lines No, Standards Compliant Materials, Package Quantity 50