Dear Customer, First of all, we would like to thank you for your interest in Koton. We recommend you choose size M. However, body measurements may vary from person to person. You can easily determine the most suitable size for you by reviewing our size chart and product reviews. "The fabric of this product is not very thick; it has a ""sandy fabric"" structure, has some stretch and feels light/thin." Additionally, since the fabric content is 94% polyester and 6% elastane, it fits the body in a form that is full but not heavy. We present it for your information and wish you healthy days.