WARNING: GRAPHIC DESCRIPTION TO FOLLOW. MAY BE NECESSARY TO BLEACH YOUR BRAIN TO REMOVE THE IMAGES.
I'm 36 years old and I have always had "granny boobs" ever since they started getting bigger than a C cup. When I was 15 the first boy who had the good fortune to get a peek at the girls, made a nasty face and coined the term. Needless to say, he was history but his comment still lives on.
While I am nursing right now, and wearing a 38DDD, they don't look any fuller. I can say with 100% certainty that I have loose skin that I can pinch and lift up, like a flap, around 4 or 5 inches. When I don't have on a bra, the breasts flatten out and droop down almost to my waist, and if I were to measure them I'm sure they wouldn't even add one inch to my band size. If I walk around braless I have to cross my arms over my waist to stop any jiggle, nowhere near where breasts are supposed to live. They sort of resemble a tennis ball in a sweat sock when I bend over and catch sight of them.
Since losing 30-ish pounds, the droop doesn't extend the full eight inches that it used to. Yes, I measured from my cleavage down to the bottom.
I've made myself curious now, and I'll measure again tonight, but I'm sure they shrank upwards at least 1 or 1.5 inches.
So, the good news is, they do get smaller and start going back where they originated. The bad news is, they don't get firmer or lifted.
Sorry for the gross mental images. Take a bleach break now.