We carry a wide range of cake boards in Silver Cardboard that you can cut to shape/size for odd sizes, and solid MDF boards covered in black, white or silver.
MDF 6″ to 18″ round or square, and 14″x16″, 16″x 28″ rectangle
CARDBOARD 4″ to 18″ round or square, and 14″x16″, 16″x20″, 16″x28″ rectangle