The size of my Wifey's boobs changes drastically when gains or loses weight.
She was a G-cup when I first met her in her 20s, and weighed about 140lbs. She always goes on those yo-you diets, so went down to an F-cup, the smallest I have ever known her to be, and was about 130lbs.
But she gained all the weight back and even more reaching about 150lbs and was then a J-cup for the longest time, and then gained even more weight and went up to a massive M-cup briefly. She was about 170lbs then - she is a very short woman, and she felt very self-conscious about being so large.
I loved the fact that her boobs were so massive, but she felt extremely unhappy with her appearance then and never allowed me to take any pics of her at that point. Of course she decided to lose a lot of weight and is now back down to a H-cup.
Her goal is to go back down to 130lbs and a F-cup.
So the other day I asked her to wear her ideal 34F bra to see how far she is from her goal (she always keeps her old bras even when they no longer fit because she knows she is very likely to change size again).
So here are a couple of pics of her current H-cup boobs in an F-cup bra, as well as a couple of pics of her current H-cup bras compared to a F-cup.