I bought a sleeveless PW jersey a couple years ago. At the time, I weighed about 115 pounds so, at 5'4, I was fairly lean, especially up top. I'm definitely an A cup.

Anyway, I first ordered a small but couldn't get it on, at all. So I exchanged it for a medium. It was still way too tiny and ill fitting. I had to wonder who in the world it would have fitted. There was absolutely no give in the material or shelf bra. That's hardly what you want in athletic gear.

Needless to say, I haven't really considered buying anything PW again. Designs aside, I want my cycling gear to be comfortable.