I went to Nordstrom today because I needed a new bra that fit really well. I figured I would get fitted while I was there. I almost fell over when the saleswoman told me I was a 32D....I have been wearing a 34-36B. I ended up buying 5 bras (although 3 were on sale!), already I feel the difference.
You always hear that statistic about the majority of woman wearing the wrong size, but in no way did I think I was off by that much!
I was also impressed because she measured for my band size, but could tell just by looking what cup size I was!