I'm 5'3", weigh 105 lbs, and I have no boobs. I usually buy my swimsuits at target because I need a small top and medium bottoms. The top of this swimsuit fit like a target medium and the bottoms fit more like a small but they're still wearable. The straps are adjustable on the top so that helped but the back only has one setting so I'm probably going to sew some bra clasps on there so I can make it tighter. The swimsuit is really cute though so it's worth the alterations.