I was a C cup at my heaviest weight (but I have to say, they were always sore and I was always uncomfortable with them at that size and hated the extra attention from it, needless to say, however, DH was a HUGE fan

).
Now I'm happily a B cup and near enough to my goal weight that I don't think they'll get any smaller. That being said, I wouldn't mind if they shrunk a bit more even, because running is way more comfortable the smaller my chest size. DH misses my Cs but I must say, I definitely don't!