I was skeptical about the "one size" sizing but I'm a 36 B/C and it fits great. No pinching or binding anywhere. The soft cups are great under t-shirts and can be removed for washing. I wore this to yoga class and it was super comfy and no clasps in the back meant no digging into my back. I have used this for moderate exercise and yoga and it's supportive enough for me. I'll definitely buy more.