This is a cute looking sports bra, but not for much of a workout beyond yoga or anything low impact. No support for the girls. The straps in the back are attractive but the cut under the armpits is so high it squeezes out the fat on the front and back of the arms a little bit. And when you are moving your arms a lot, it rubs some there under the arms. I do wear sports bras to work every day, so it will be great for that because they seem stretchy and the fabric is soft, but jumping jacks? Uh uh. I am 5’2.5” and 123lb, 34 C/D and I ordered a medium.