Specifically, the three-piece suit of clothing is divided into two front pieces and one back piece (although the suit has a middle seam, it is still one piece), and the width of each piece is close to one third of the total fatness of the clothing. This design can create a slim effect and is suitable for formal occasions.
In contrast, a four-piece suit means that the width of a garment piece accounts for about a quarter of the bust, and it is often used in some loose or casual clothes, such as shirts, jackets and coats. The feature of four-piece clothing is that the front and back pieces have obvious dividing lines, which visually presents a more relaxed and comfortable effect.
It should be noted that different clothing brands and styles may be different, and the specific cutting methods and design details may be different.