Red stoneware with colored porcelain slip and hand drawing clouds. This mug is dishwasher and microwave safe. Due to the process of making, the surface has some texture to it, but overall smooth. The artist choice mugs allow me to be creative with patterns and designs. Each one is unique, and I do my best to not repeat patterns. This mug is an example of the motifs offered. - Approximately 4.5" x 3.5" - Holds 10oz