The society advance of a development of the science technique and women from the industrialization, women prefered the tailor-made clothes to the convenient ready-made clothes in the aspect to be economic and save time in the clothing habits. After marriage, middle age women change the comparison of their body due to the pregnancy and birth, the body girth of them increases compared with young woman, the winding of the waist comes to be small and they show the feature of body which the vibration thickness and the brachial girth grows bigger. The reason is that the problem on the fitness of the ready-made clothes comes into being. According to this result which analyzes a ready-made clothes body of the jacket-brand which does the middle age woman to the target in research, actual purchasing age appears than the age which most companies do to the target so that it is high, and though the body is divided in KS standard, the measurement distinguished without the body and most companies were producing the jacket. There was many case to select a fitting model Among a designer or within firm employee with the similar body and measurement. It was revealed that high rate of mending relation of a sale jacket of the company. Research about the body of the ready-made clothes is thought by continuing over there.