Wearing a small in this striped set- runs a tad big, so if in between sizes I would size down. The small is pretty oversized on me, but I like the more relaxed fit. I find myself grabbing this set ALL the time and always get so many compliments! I will link the rest of my most recent Amazon order as well- lots of cute active tanks! LTKFindsUnder50 LTKStyleTip LTKPetite