Handmade Materials: ceramic Capacity: 12 fluid ounces Each mug is individually wheel thrown, glazed, and fired in our studio. After the mug is fired, the clay is polished to create a nice smooth surface for a velvety soft feel in your hands. We thrive to make all of our mugs as identical as possible, but due to a clay shrinkage and nature of handmade process, the mugs may vary in size color and thickness of the rim handle. Approximate dimensions:4×3.5 in diameter Approximate volume: 12 fluid oz with a little space to the rim