MailPacBags 11" X 13" Poly Mailer Pouch 2.5 mil (100 Ct) Plastic Mailing Envelope with Adhesive Strip, White, Weather Water Resistant 2.5 mil sturdy mailing pouch with seal strip Perfect for business customers, looking for a reasonable shipping solution 11" width by 13" length Meets mailing standards for all major carriers White outside, black inside and non-transparent