I'm not a large person generally, having two kids has made me slightly fatter but not so much - I still have a tiny waist (yeah I know I'm a lucky cow but you should see the scars from all the surgery [wink).
With DD my boobs went up to a 34DD and I felt huge - my waist was 25 inches and I looked pneumatic.
Yesterday I went to get measured as I had the 'second pair free' effect due to a too tight bra and they are now 34G
It's a special order FFS - I didn't even know you could get bras that big!
And I'm still making about half a pint extra a day which just dribbles out into breast shells. The SCBU is happy, me, not so much!