Description
Pricing 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. However, there is no need to meticulously measure your parcel when using our specifically designed letterbox friendly postal packaging; each product on this page will fit into the large letter category provided that the boxes are not overfilled causing the contents to bulge, enlarging the dimensions of the parcel. It is important to note that overstuffed boxes that cause the cardboard to bend will not be classed as large letters by Royal Mail and may incur higher postal prices. To fit into the large letter specifications, these box lids must lie flat. In Proportion (Pip) Brown Cardboard Postal Box
