Please read my profile before purchasing or commenting. Recommended size for junior high school students. Used for two seasons during the New Year's calligraphy period. This calligraphy brush is recommended for beginners, with a strong core. It's a mixed-hair calligraphy brush made of white horse hair and red horse hair, providing a soft writing feel, good brush control, and moderate ink retention. - Product Size - Total Length: 244mm Bristle Length: 66mm Bristle Diameter: 15.5mm Shaft Diameter: 11mm (at the thinnest point) Hair Type: Horse Hair Shaft Type: Wooden Shaft Size: No. 6 (fraction)