C4 C5 C6 C7 Size White Postal Pip Box Die Cut RM Large Letter Cardboard Mailing In Various Quantities

White C4/A4, C5/A5, C6/A6, C7/A7, Pricing in proportion (PIP) die cut cardboard postal boxes White on the outside and Brown on the inside Large letter qualifying Made from a hard 1.2mm Thick single wall cardboard PLEASE SEE FULL DESCRIPTION BELOW FOR SIZE GUIDE