Ha. Screw VS. I Had mine sized there, and they said I was a 36DD (totally wrong, btw.)
I went to Fredericks of Hollywood, and the woman had a really hard time sizing me for some reason. She told me after about 20 minutes of throwing different size bras at me that she *thought* I was a 34DD. I used to be, but after losing a little bit of weight, they shrank a cup size or so. This weight loss was prior to getting fitted, mind you.
I find a 34D fits best. The DD was too big, and my boobs kept falling out if I'd move wrong. Not sexy. I'd like to be properly fitted one of these days, though.