(Quantity 100) 7 1/4″ x 12″ Bubble Lined #1. 100 Envelopes. High Slip 3/16″ Bubble for Easy Insertion. 7 1/4″ x 12″ Kraft Self-Seal. Constructed from 100% Recycled Golden Kraft Paper. Self Seal w Convenient, Tamper Evident, Peel and Stick Lip.