CertBuy 50 Pcs cardboard mailers for books, 11x14 paper mailer envelopes, white cardboard envelopes, document mailers, photo mailer Feature: -Ideal for post offices, courier & express companies, logistic and parcel shipping companies, packaging wholesalers, mail order companies, shipping supplies sellers, office stationery suppliers, online stores, home or personal use. -tear-strip makes it easy opening, without other tools -Using high-quality hot melt adhesive, the glue has strong viscosity and prevents things from falling out. -Widen the sealing edge, more fit, not easy to burst, keep your good safe during transit. Specification: Length: 347mm/13.6inch Width: 283mm/11.2inch Quantity: 50 Color: white Style: flat Package Includes: 50 x Cardboard Mailer