This medium size Rigid Recycled Mailer provides maximum corner and edge protection. It’s ideal for sending documents, books, photos, certificates and more. Internal size is 240mm x 330mm, so easily accommodates A4 documents and certificates. Made from 90% recycled paper including 50% post-consumer waste. The Recycled Rigid Mailer also includes super rigid Kraft fibreboard which resists bending and folding. Features Press-Seal and easy open tear off strip.