Rigid Kraft Cardboard Mailers

Rigid Kraft Cardboard Mailers Stay-flat envelopes that do not bend. Peel, seal, ship. Some shipments must arrive flat. Photos, art prints, certificates, vinyl records, calendars, documents, books. A padded mailer cushions them, but it does not stop them from bending. A rigid mailer does. Made from stiff kraft cardboard, the rigid mailer holds its shape through sorting machines, mail bags and letterboxes. The self-seal strip closes it in one motion: peel the liner, press the flap. A perforated tear strip lets the receiver open it cleanly, without a knife anywhere near the artwork inside. It ships as a flat envelope, so in the UK most sizes travel at Large Letter rates instead of parcel rates. In the US, USPS charges rigid mailers at parcel prices. For anyone mailing prints or documents at volume, that difference adds up fast. Postage bands by carrier, including why USPS charges a rigid mailer package prices, are in our e-commerce packaging guide. Good for: art prints and posters (shipped flat), photographs, certificates and legal documents, vinyl records, books and magazines, calendars, embroidery and craft patterns, gift cards. Why rigid mailers Why flat goods ship in rigid mailers The standard shipping format for prints, photos, documents and records. Stiff 350-550 gsm paperboard keeps contents flat through sorting machines and mail bags. Self-seal strip: peel the liner, press the flap, done. Perforated tear strip opens cleanly, no knife near the artwork. Flat format: most sizes post as a Royal Mail Large Letter in the UK. 100% kraft paperboard: recycle with paper where collected. FSC® option available (FSC® C232146). Brown kraft or white, printed inside and out with your design. At a glance Specifications Material Rigid kraft cardboard (paperboard) Composition 100% kraft paper board, FSC® certified available (FSC® C232146) Board weight 350 to 550 gsm, matched to size and content Closure Self-seal adhesive strip Opening Perforated easy-tear strip Common sizes 15×20, 17×23, 23×30, 25×31, 24×32 (A4+), 33×46 cm, or custom Colors Brown kraft, white, custom Printing Any logo or full design For retailersReseller readyOne of the strongest shelf items in the whole range. Stationery stores and post office shops sell rigid mailers every day to small sellers, artists and offices. We supply counted retail packs (10/25/50 pieces), shrink-wrapped or boxed, plain or private label.FAQ’sWhat is a rigid mailer?A stiff cardboard envelope that keeps flat items from bending in the mail. Also called a stay-flat mailer or board-backed envelope.Are rigid kraft mailers recyclable?They are made of kraft paper board, so they can go in paper recycling wherever paper and board are collected.Can rigid mailers be branded?Yes. We print logos or full designs, inside and outside. White mailers give the cleanest print result.Tell us what you mail flat.We’ll propose sizes and send a benchmark. Request Rigid Mailer Pricing Linkedin Or download our full product catalogue