Size is S. It's very easy to move in and fits well without being constricting. The fabric is incredibly comfortable, you could fall asleep in it! There's a little bit of wear, but it's still perfectly usable. Leggings are also sold as a set. Please take a look! Dark green cross-strap design yoga bra. - Color: Dark Green - Design: Cross-strap design - Size: Japanese size 5 (US size 6) S size Thank you for looking.