Size approx... Brush... Bristle length 60mm x diameter 10mm x bamboo length 290mm The following is quoted from the internet ↓ Horse hair brushes and weasel hair brushes have different hair qualities and characteristics, and their suitable uses also differ. Horse hair is hard and has a very strong stiffness, providing stability, while weasel hair is characterized by its supple elasticity and good cohesion. Horse Hair Brush Horse hair is very hard, and its strong stiffness is its greatest characteristic. Advantages: Because of its very strong stiffness, the brush is easy to stabilize, making it easy to handle even for beginners. It has excellent durability and lasts relatively long. Because the hair can be long, it is mainly used for large brushes. It is suitable for powerful lines and expressive works that make use of blurring. Disadvantages: Because the hair is hard and rough, it may not be suitable for smooth lines or delicate expressions. Suitable uses: Large-character calligraphy, creating works that require powerful expression, dyeing with dyes, etc. Weasel Hair Brush (Yūmō Fude) Weasel hair is characterized by its supple elasticity and the good cohesion of the hair tips. Advantages: It has moderate hardness and suppleness, making the brush easy to handle. The tip of the brush is sharp (sharply pointed), and it is versatile, allowing for expression from thin to thick lines. It absorbs water and paint well, and the hair tip wear is extremely low, so it is also used for the highest-grade face brushes. It provides a smooth writing feel, providing a satisfying experience for beginners to advanced users. Disadvantages: Compared to horse hair, the hair is shorter, and it is often used for small and medium brushes. It is rare and becoming increasingly difficult to obtain year by year, so the price tends to be high. Suitable uses: Calligraphy such as kaisho (block script) and gyosho (semi-cursive script), detailed coloring, face brushes, pointillism in Japanese painting, model painting, etc. Summary Horse hair brushes are suitable for drawing hard and powerful lines and for use with large brushes, while weasel hair brushes are particularly excellent for drawing delicate lines with suppleness and good cohesion and for use with small and medium brushes. Both have excellent characteristics, so it is important to use them according to the application and the expression you want to achieve.