Black Stoneware Seashell MugBlack stoneware clay with porcelain slip incisions that are filled with oxides and fired to appx 2000+ degrees. All are finished with hand applied transparent glazes. All black clay mugs are 3. 5" to 4" tall and 3. 25" to 3. 5" in diameter. Each mug holds at least 8oz+ of liquid. Each mug is unique and one of a kind complete with slightly quirky marks and indentions, including those from my fingers, adding warmth and texture that define the character