As an item of men's clothing, which is an important part of the ready-made clothing sector, the classic jacket is used by a large number of people. In order to give the body a good look, the jacket necessarily has to restrict several movements of the body. However, keeping this restriction at a minimum, allowing the individual to wear the jacket for longer periods during the day, and increasing comfort and efficiency requires designing the jacket in such a way that it fits the body and adapts to the wearer's movements. The aim of this research is to determine the problems experienced by men with classic jackets with regard to body fit and freedom of movement, and to design a classic men's jacket pattern fitting the body of men with body measurements Drop6/Size50 which ensures freedom of movement. This is an action research type of study. The research population is men with normal body characteristics living in Turkey. The research sample is comprised of the Drop6/Size50 customers of the store belonging to the company collaborating in the research, located in Ankara, in which most of the national transactions of the company take place. Frequency (f), percentage value (%) and arithmetic mean ((x) over bar) were used in the analysis of the quantitative data obtained in the research with the survey form. As a result of three experiments, a classic jacket pattern fitting the body and ensuring freedom of movement was obtained.