Hello @ all
Maybe these links will help you to get a better overview :
http://www.plussizebras.info/
http://www.plussizebras.info/guides.html
I also found a site where you can calculate and compare bra sizes
from different countries (lower section, below the pics) :
http://www.big-cups.de/shop/index.php?s=a7701859b75c932a0bb8831f3bf8edf4&p=bh_groesse
It's a pity this site is only available in german language.
So i translated the important quotes, i think the country table on the right
speaks for itself.
Ćberbrustweite = upper bra size / bust line
Unterbrustweite = rib cage size / under bust
1 inch = 2,5 cm
Have fun and success !