how do you measure your bra size?
You can have it professionally measured at a bra store/bra section of store, and you can do it yourself (check google, they show you how to measure your bra size at home). But what I did is just try on a couple of sizes of bras that would seem to fit and I did find one. That's the easiest thing to do :)
you go to a shop that will do it for you not just any shop a underwere shop should be able to do it for you
We have a How To for that: http://howto.funadvice.com/howto/buyproperlyfitted_bra