I purchased this here before and used it about three times, but the size is too big for me, and the underbust keeps shifting when I move, so I'm selling it. There are some pills on the underside of the underbust elastic, and the tag was originally cut off. I don't think it affects the use. It stretches, so this is just an approximate size, but the underbust measurement is 32cm when laid flat. I think it's equivalent to a standard sports bra size M. I don't think the elastic is too tight or anything. I plan to ship it via Nekopos. This is a blue-purple gradient and striped pattern NIKE PRO sports bra with a cross-back design and excellent elasticity. - Brand: NIKE PRO - Color: Blue-purple gradient - Design: Striped pattern - Style: Cross-back - Features: Stretchy material Thank you for looking.