Rigid Kraft
Cardboard Mailers
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 it usually travels at large-letter rates instead of parcel rates. For anyone mailing prints or documents at volume, that difference adds up fast.
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 flat goods ship in rigid mailers
- 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-envelope format usually posts at large-letter rates, not parcel rates.
- 100% kraft paperboard, recyclable curbside, FSC option available.
- Brown kraft or white, printed inside and out with your design.
Specifications
| Material | Rigid kraft cardboard (paperboard) |
|---|---|
| Composition | 100% kraft paper board, FSC certified available |
| 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 |