Royal Mail Large Letter Cardboard PIP Boxes Mailing Postal C4 C5 C6 C7 Mini
PIP 0 C7 Diecut 101x101x20mm Large Letter. PIP 3 C4 Diecut 322x229x20mm Large Letter. PIP 1 C6 Diecut 160x110x20mm Large Letter. PIP 2 C5 Diecut 222x160x20mm Large Letter. Manufactured in a single wall E-flute cardboard.