3" by 3" tiles made with stoneware clay and fired to high temperature. The three-inch by three-inch size works well installed with other 3"x3" or 6"x6" or 12"x12" commercial or handmade ceramic tile which is more thick. These sizes of tiles make excellent low-cost gifts and are excellent for installation. We enjoy keeping some around to just feel the texture of the tile since it is made of clay, or earth.