I stopped by Nordstrom Rack the other day, and they had a whole bunch of new sleeveless tops. I tried on about ten of them. None of them fit me. All were too big/low around the armpit. What am I doing wrong? Do I need a smaller size? I usually wear large in tees because I'm a little busty, and I don't like things to be too tight there. But I wonder if I need to try a medium in sleeveless/tank style tops? It's so hot here, and I'd love to have some.

Does anyone else have this problem?