MasterChinese Red Watercolor Chinese Calligraphy Painting Sumi Drawing Kanji Brush Set Jian Hao (Goat-Wolf hair) - Medium - (with Brief Introduction) Includes: 3 (THREE) brushes-Goat and wolf hair (jian hao) and a brief welcome Introduction Hair length: 5, 4.3, 3.7 CM (2, 1.7, 1.46") Diameter: 1.05, 0.95, 0.85CM (0.41, 0.37, 0.33 ") Bristle is round and full when absorbing water. See photo See size comparison with a CD and a pen (not included) Level: VERY GOOD for Chinese calligraphy and painting. Even for the pro. (See sample drawing on the side. ) Also, this brush is lab tested to ensure chemically safety for users