The raw surfaces are hand-turned in porcelain, Bone China. They are glazed inside and on the edge, the grooved surface is rough / unglazed. The grooves are a long spiral that is turned from top to bottom.
Raw surfaces are counters or small dishes.
X-small: Ø = 8 cm.
Small: Ø = 16 cm.
Medium: Ø = 22 cm.