Heart Mould: 3.3 x 3.2cm/1.3 x 1.26in. Rainbow Mould: 4 x 2.5cm/1.57 x 0.98in. This is a perfect choice to make your own special earrings with your own hands. It's a great life experience. Before using the cutter, you can cover the clay with plastic wrap so you can more easily remove the finished product.