Prang Tempera Cakes offer brilliant, opaque colors & smooth laydown. This complete tempera kit includes water wells & a paint brush. Nine blendable colors come in a compact easy-to-store plastic tray. These cakes are ready to use when you are. When finished, put the clear cover back on & allow cakes to dry out. Each block measures 1-1/2" x 1-1/2" x 5/8".