[Nickie]

After you've got these measurements you can plug them in to this calculator http://www.brasizecalculator.tk for an estimate.

... it said i'm a 34FF .......

i'm a large C at BEST and more of a 36 too, there's no way i could be 3 cups more than that, ever i don't know where i messed up but that's reaaaaally far from reality

i've had closer results with http://www.85b.org/bra_calc.php , wich sometimes gives erratic results ( add or remove a centimeter somewhere, and it skips 2or3 cups further )

but either way those circumference-based calculators can't know how much air fills the volume between your breasts, that's where the bias is i think and also the reason why the results are always too big and never too small ...
so nothing beats an actual fitting with actual bras at the shop, the right band size should be easy to figure out, then from there it's all about chosing the cup that fits right