Mailer Envelopes, Material Poly, Mailer Type Bubble, Closure Style Self Sealing, Color White, Usable WxL 12 1/4 in x 18 in, Usable Width 12 1/4 in, Usable Length 18 in, Outside WxL 12 1/2 in x 19 in, Outside Width 12 1/2 in, Outside Length 19 in,...