Mailer Envelopes, Material Poyethylene, Metalized Polyethylene, Mailer Type Insulated, Closure Style Lip and Tape, Color Silver, Usable WxL 14 1/2 in x 16 3/4 in, Usable Width 14 1/2 in, Usable Length 16 3/4 in, Outside WxL 15 in x 17 in, Outside Width 15 in, Outside Length 17 in, Mailer Number #7, 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