This is a soba choko (small bowl for soba noodles) with a flat bottom, likely from the mid-Edo period. I own several of these, but due to their thin construction, most are damaged. This particular piece is in relatively good condition. * There is a slight chip on the rim. Please check the images. Diameter: Approximately 6.3cm, Height: Approximately 5.1cm Type: Ochoko (small sake cup) Material: Ceramic