This sports bra is SO CUTE and fits great. I have a small chest so ultra support is not necessary for me and thus it works well for activity. I could see how this bra isn't very supportive if you have a larger bust. Fits comfortably and doesn't do any weird squeezing with the straps in the back. I am a size small/size 2-4 (size 4/6 in lulu sports bras) and the S/M fits just right.