This set of 10 mugs were hand thrown and trimmed on my potter's wheel using a white stoneware clay. It was bisque fired and the glazed with a beautiful drippy white and beige glaze and then high fired in my electric kiln. The approximate size is 3.25" wide across the rim and 4" tall, holds 14 ounces of liquid. These are dishwasher, microwave and food safe.