Large Letter box Royal Mail PIP Boxes C5 C6 C7 DL Mini Card board Postal Mailing
Pricing in Proportion (PiP) large letter boxes are designed to provide maximum protection for your products. Brown Buff Tape. C7 101 x 101 x 20mm (Large Letter). C6 160 x 110 x 20mm (Large Letter). C5 220 x 160 x 20mm (Large Letter).