Abstract: A pair of woman trousers is composed of two major parts: legs and waistband. Prototype structure is the structural standards for changing the silhouettes. Based on prototype structure of woman trousers, by changing the designs for legs and waistband and by using various molding methods such as cutting, pleating and yoke, women’s trousers with different styles and silhouettes can be designed.

Key words: woman trousers; prototype; silhouettes