This is a suzuri (inkstone) in a dedicated wooden box. It is believed to be a Chinese Duan inkstone, but the details are unknown. I purchased it as a used item and have been storing it. Size: Inkstone body 13.5 x 7.5 x 2.0 cm Wooden box 15.8 x 9.5 x 3.8 cm Please refer to the photos for details. Feel free to ask any questions in the comments. #MIYA's Miscellaneous Goods Shop