Cakeboard Marble Round Extra Sturdy Ø20cm The Cakeboard Marble Round Extra Sturdy Ø20cm has a chic appearance. This is because the board is covered with a foil with a marble print. The diameter of the cake board is approximately 20 centimetres. Thanks to this size, the cake board is perfect for serving and presenting small cakes. Among other things, a cake board is handy to use in a cake box. If you use a cake box without a pad, the box can get damp. A cake board stops the moisture and keeps the box sturdy. Besides, you can perfectly use this board instead of a cake tray.