Set includes 50 kraft bubble mailers Outer dimensions: 8.5×12 inches Usable/inner size: 8.5×11 inches Made with kraft paper and a bubble-lined interior for added cushioning during shipping Built to resist tearing and punctures for dependable protection in transit Features a self-sealing adhesive strip for quick, secure closure Yellow kraft finish Suitable for shipping fragile items, brochures, catalogs, books, bulky contents, gifts, and electronic media