Clay is a porcelain stoneware mix. Carved pattern and painted with cobalt blue, red, and yellow underglaze and a glossy clear finish outside and white on the inside. Stamped on the bottom. Each plate is hand-built, carved, painted free hand and is unique. Each with a flower and sun carved into it. These little plates also work as saucers for the mugs! Dimensions vary slightly. Dishwasher safe. Photographs do not depict the exact piece you will receive.