The paper grammage of a Letterbox is the same as the chosen variant of a mailer box. For most cases, it is high-quality corrugated cardboard with grammage 210g/m2.
Celebrate our bestselling Custom Mailer Box this fall. Use code BOXSEASON2025 to unlock up to £80 off.
Choose other country
The paper grammage of a Letterbox is the same as the chosen variant of a mailer box. For most cases, it is high-quality corrugated cardboard with grammage 210g/m2.