[Tinkerbells]

Hey, I use this bra calculator here: http://www.brasizecalculator.tk
I find it has gotten the most accurate measurements for me. It takes into account a lot of the things most bra calculators or measuring techniques not even touch on.
I hope this helps you.

oh my, I used it and got 34G-- I wonder if I am wearing the wrong size :o

You could be! It's all relative from the inches of the band size to the bra size. It takes into account your fullness and projection of your breasts too. It sounds like you have been wearing the wrong sized bra, if I knew your band size measurements, I could know for sure. Technically I should be a 24HH/J, but sadly that is a extremely hard size to find!