1. By gender: men's wear, women's wear, children's wear, etc.
2. Classification by season: spring clothes, summer clothes, autumn clothes, winter clothes, etc.
3. Classification by use: sportswear, professional clothes, casual clothes, dresses, etc.
4. Classification by style: jackets, trousers, dresses, suits, etc.
5. Classification by material: cotton, wool, silk, man-made fiber, etc.
6. Classification by brand: Adidas, Nike, Zara, H & ampm, etc.
These are just common classification methods. Actually, there are many other classification methods, such as color, size, popularity and so on.