This is a sake cup by Kiyoka Shiohara, a glass artist based in Toyama. Size: Approximately 5.2cm in diameter Approximately 5.2cm in height I received this from an acquaintance. It is new and unused, but it does not come with a box or instructions. Please be aware of this. [Glassware Care Instructions] Wash glass with a soft sponge and immediately wipe off the water with a cloth. Water stains may form if left to dry wet. Avoid strong impacts, pouring boiling water, and using in the microwave or dishwasher.