I believe this is a mortar and pestle set for playing house during the Taisho and Showa eras, but I don't know the details. It may have been a part of a Hina doll set. It's a size that could be used as a sake cup. As you can see in the images, there are areas that have discolored to a dark gray. Diameter: Approximately 8cm Height: Approximately 3.7cm Sizes are approximate. As this is an old item, there are scratches, stains, and other signs of wear and tear commensurate with its age. The actual color may differ slightly from the images. Please examine the description and images carefully before purchasing.