Obviously I know they'll be different for everyone. But when figuring out your ideal weight it would be useful to know wouldn't it...mine are big and always have been, so I'm now a size 6/8 with 30F boobs and used to be a 16/18 with 36GG boobs. I have friends who have much bigger breasts and weigh less than me but complain about being fat. I was trying to explain that if they had smaller boobs they'd weigh less and this would effect BMI etc, but just talked myself into circles...am I making any sense?!
I think what I'm trying to say is that given it's nigh on impossible to spot reduce fat from certain areas and breast tissue varies so much from woman to woman, wouldn't it be useful to be able to weigh breasts and do healthy weight calculations etc without including that weight? After all, being a B cup or a G cup doesn't affect your health in the same way as fat on your stomach, for instance? (Back problems aside!) So at 5ft 5 a healthy weight for someone with G cups might be 10st but someone with B cups might be better off at 9st. (I'm making these figures up btw.)