Prang Tempera Cakes offer brilliant, opaque colors and smooth laydown. This complete tempera kit includes water wells and 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 and allow cakes to dry out. Each block measures 1-1/2" x 1-1/2" x 5/8".