I purchased this new about 10 years ago at a Ralph Lauren outlet store. Size is XS, but it's probably equivalent to a Japanese size S when compared to jackets. Measurements (measured flat, so there may be some errors due to being a novice): Shoulder width: 44cm Body width: 52cm Length: 62cm Sleeve length: 61cm There is some fading and wear commensurate with its age, so please refrain from purchasing if you are not comfortable with used clothing. There are no defects such as zipper malfunctions or missing buttons. Please consider.