ROYAL MAIL PIP LARGE LETTER MAIL CARDBOARD POSTAL BOXES BROWN WHITE C4 C5 C6 DL
PIP C4 - 320 x 230 x 19 mm (Large Letter Box). PIP C5 - 219 x 159 x 19 mm(Large Letter Box). PIP C6 - 112 x 160 x 19 mm(Large Letter Box). PIP DL - 220 x 110 x 19 mm(Large Letter Box). Available in Brown Manilla colour.