12" x 15 1/2" Red Poly Mailers. Strong polyethylene mailers protect products from moisture during shipping. Colored mailers attract attention. Mailers are puncture, water, tamper and tear resistant. High strength seams will keep contents intact even if over packed. The outer surface of the mailer is colored and the inner lining is silver. Labels stamps and ink adhere well. Opens easily with a perforated tear strip. Self-seal.