Decided to size up since i have bigger breasts (D cup). The top offers a lot of coverage so if that's what you're going for it's perfect. The style of this top will make your breast look bigger. Something to keep in mind. Bottom runs small. its a little tight specifically around the thighs. i would say if you're in between sizes, size up because of the bottom part. you can always adjust the top for a tighter fit. for reference im 5'3 122lbs.