Top: S Skirt: XS Since these are overseas sizes, they would likely be M and S in Japanese sizes. Fila Tennis wear Women's Top and bottom set The armpit width is approximately 40cm. Shoulder width is 38cm. The skirt's waist is 33cm when laid flat (elastic waistband, so it stretches). The skirt has a ball pocket in the inner shorts. Used 2-3 times, and appears to be clean with no noticeable stains. Although it's size S, it's an overseas model, so it should fit someone who usually wears size M. For those who like Ellesse, Nike, Babolat, and Prince, how about this?