Eizan Teacups Sencha Bowls 5-piece Set Diameter: Approx. 5.8 cm Height: Approx. 4.2 cm I received these from my parents' home. The frequency of use is unknown. - There is a stain-like substance on the foot of one cup, which I tried to wash off but it wouldn't come off. - One cup has a small pinhole-like indentation on the bottom. Please check the photos carefully and purchase only if you understand these points. *There is no original box, so it will be shipped via Takkyubin Compact or Yu-Packet Plus.