Since man's business suit is the first choice for their daily work and commercial activities, and the symbol of international finery culture, the pattern of it has always attracted people's attention. With the development of international culture, congruent-shape-suit becomes popular among gentlemen. However, this style of man's business suit for perfecting one's shape, which the patterns of chest and back are made smaller, is a little tight and not so comfortable to strong and husky ones. At the same time, such conditions may also cause the distortion of other parts and destroy the slinky shape of the suit. When you design the congruent-shape-suit for strong and husky men, optimizing outturn sheet of a broad back is very important to comfort and beauty.