Clay Pottery Mold - Handbuilt Dish Set - Rectangle 8x13 - Penguin PotteryPenguin Pottery ceramic molds for pottery are used for handbuilding dishes and plates with pottery clay. Just press a slab of clay onto our pottery forms to create identical copies of these shapes. The rectangular 8" x 13" plate mold form design allows you to create perfectly uniform dishes with edges that are smooth, even, and perfectly angled. Its strong, durable construction is perfect for creating unique dishes, trays, and bowls with all kinds of