This is a bit of a modern take on your traditional porcelain gaiwan.

Dimensions (inches): 3.75d x 3.25h
Materials: Glazed ceramic or glass.
Care: Handwash only.
Volume

Celadon: 5 oz.
Glass Gaiwan: 4.5 oz.
Hand Painted: 4.5 oz.
White Porcelain: 4 oz.