Thanks for all the great advice. I had been thinking about doing a mail order, but wasn't sure so I was in my LBS today for something and they had some castelli jerseys so I decided to try them on. I don't think the issue is that they run 'small' or are 'euro sized' they are just not designed for my body type. The medium fit my bust, but was loose everywhere else, and the small was too tight in the bust, but fit everywhere else. The cut was just not flattering for my body type. Oh well, at least I didn't do a mail order that I have to return.