I usually wear a small and mediums in tops, and I ordered the S/M and it was a little bit too big. It fits my boobs (32DD/32E) but not without some adjusting. Initially, the side part was gaping, but I pulled the back of the top down and it helped a little. As you can see in my pictures, the sides are still gaping. The straps are adjustable, too, which is a big plus in adjusting the front where the colors cross. The bottoms are super cute but very low cut.