Foam core or Foam board is a very strong, lightweight and easily cut material used for the mounting of photographic prints, as backing in picture framing, in 3D design, and in painting. It is also in a material category referred to as "Paper-faced Foam Board". It consists of three layers — an inner layer of polystyrene clad with outer facing of either a white claycoated paper or brown kraft paper. It can be used for many applications including craft projects, banner printing, signage etc etc The most common colours and sizes sold are white (both sides) and with a thickness of 5mm, sheet size A1 or A2 are the most popular. The are sold in packs or box quantities, generally packs of 10 or 20 sheets. Due to their properties we do not sell single sheets.