Royal Mail Large Letter Packing Boxes C6 (Pack of 25)

Royal Mail Large Letter Packing Boxes C6 160x110x19mm

These narrow, single wall postal boxes comply with the Royal Mail large letter size specification by all having a height, sometimes called ‘thickness’, measurement no larger than 25mm. The maximum weight is 750g and the length and width must be a maximum of 353mm and 250mm respectively.

Pack of 25

• Fits through a letterbox for customer convenience
• 100% recyclable and biodegradable
• Sturdier eco-friendly alternative to bubble mailers

It is important to note that overstuffed boxes that cause the cardboard to bend will not be classed as large letters by the Royal Mail and may incur higher postal prices. To fit into the large letter specifications, these box lids must lie flat.