I believe this is from the Yaeyama region around the 18th to 19th centuries, but there's also the possibility of it being from Tsuboya or another area from the same period. There are scratches, stains, minor chips, and other signs of age, but I think they are within an acceptable range. It would be a shame not to use it as a cylindrical bowl. Diameter: Approximately 9.7cm Height: Approximately 7.3cm Sizes are approximate. The actual item may differ slightly in color from the images. Please examine the description and images carefully before purchasing.