The circle shape of the Garrity Tools C1 provides a continuous and consistent curve so you know exactly what you'll get every time you use it. This is our smallest circle pottery tool. All of our C pottery tools are great for shaping the inside of clay bowls or creating a concave profile on a vessel. size: 2.5" diameter material: cherry wood Comfortable, beautiful, and practical. Handmade by a creative team in St. Louis, MO.