Royal Mail Large Letter Cardboard Postal Boxes C4 C5 C6 C7 DL boxes
Colour : Manilla. 320 x 230 x 20 mm - ( C4 Size - PiP ). 236 x 165 x 20 mm - ( C5 Size - PiP ). 112 x 163 x 20 mm - ( C6 Size - PiP ). 218 x 159 x 20 mm - ( C5 Size - PiP ). 217 x 108 x 20 mm - ( DL Size - PIP ).