MasterChinese Chinese Calligraphy Kanji Sumi Drawing - Inkstone Ink Well (6, Round Stone) Diameter 6" (15cm). Ink slab with a cover Weight: 1KG (2 lbs) Pretty deep! Depth 4.5 cm (1.8"). See size comparison with a CD (not included) 5" is also available, ASIN B00J2U71LK