Slim 3 Piece Layered Christmas Tree Cutter SetOur Slim 3 Piece Layered Christmas Tree Cutter Set includes 3 pieces that are designed to be layered on top of each other. It includes 3 cutters in sizes of 20mm, 30mm and 40mm. Because you are layering the clay pieces, we recommend rolling each piece of clay a little thinner, to a thickness of approximately 1 1. 5mm. You can either layer the raw clay pieces before baking, or bake them all separately and attach together with a jump ring for a piece