What is foam board? Foam board is 5mm thick, black, very light although rigid and used for mounting artwork. Not to be mistaken for foamex which is a heavier PVC mounting board. Although amazingly light, the compressed foam provides a modern looking mount that is robust with a smooth stiff backing. With clean, crisp edges the thickness of the board gives the picture added depth. They can easily be framed or placed on a wall just as they are.The quality of the print and the depth of the board give these pictures a striking effect. These 11"x 8" inch (A4) mounted foam boards can be purchased for just £9.99 with free postage and packing.