Hey Ggina,
I wouldn't think too much about this stuff. After a year of HRT I spent 4 months obsessing over this kind of thing, but there's not really all that much you can do about the shoulder width if you are already lean, although the curcumference will reduce with muscle loss. Your back looks really good, I think, even though it is 19 inches.
My shoulders are smaller than yours at 16.5 inches and 40inch circumference, and I am 5'8. However, the fact that my waist is extremely small (26 inches) makes my back look far wider than it really is, and gives me this pronouncd V taper that I don't like, although it gives me a relly good waist hip ratio - i guess we can't have it all. I started out with a 35 inch waist, about 15 months ago, which made me look like a tube lol.
I was never a high level bodybuilder like biblinda, but did workout a lot, and could hold my own at the gym, and was very good at moving furniture lol. I did a lot of lat pulldowns, barbell rows, dumbell rows, and stiff legged deadlifts, and although I was never huge, I was fairly big, and people would often comment at how strong I was for my size, even when using strict form.
After 15 months of hrt I have lost a significant amount of muscle. My underbust went from 32 inches to about 30.5 inches, but if I go really tight I can get it to 30 inches. You said your underbust is 34 inches now, so I would expect realistically you can get down to 32 if you lose more muscle, depending on how much is there now. 32 inches isn't bad at all - I think it still gives you a 36 bra band size, which I believe is average. My wife is 5'4 and 110lbs, slim, small framed, with 14.5 inch shoulders, and she still wears a 34 band bra. So at 6 foot, if you can get into a 36 band bra you're doing pretty well. I saw your other comment about envying that girl who has 15 inch shoulders - lol those are small, even compared to a lot of natal women.
Although I have lost a lot of muscle, I still have enough muscle to make me feel like a female olympic athlete when I flex. I can still do 50 pushups and 10 wide grip pullups lol although that's probably cost I lost 60lbs too. I have kind of altered my perception of my role models now - instead of looking towards women like those Hollywood starlets, or models, I tend to look more now at women like Marion Jones (well, not when she was at her steroid pumped prime, but rather how she is now, a lot softer, but still a mesomorphic female build) and other more athletic women.
I wouldn't expect your actually hips to increase, at least not in width. Your butt would increase in rear projection a lot, and marginally in side projection. Your butt will look bigger if your waist reduces, but then you'll end up having my problem with a smaller waist and an exaggerated V taper lol. It's reall all about compromises. Unless you are incredibly young and lucky and get some bone increase in hips from hrt, you would probably want to look at some form of surgical enhancement to increase the side projection of your hips.
As a bodbuilder biblina would understand that it's not just about overall size, but about relative size - creating the illusion of size or lack of size by modifying what can be changed, like you said, your back. I had to laugh at what biblina said about feeling like her shoulders were too narrow when she was still a gym junkie - I felt the same, although for me I was at least working out when I started with a bunch of Asian guys, so we were all pretty much a similar frame lol. When I moved to New Zealand and then to Australia I felt like a right shrimp when I went to the gym. Waiting to use the bench press when there's a six foot three 280lb Samoan giant using it is quite intimidating lol.
I think it's easy to lose a lot of initial muscle bulk. I have found, however, that once I reached a certain point of reduction I have been unable to lose any more muscle, at least not while maintaining what one would call a healthy diet / lifestyle. I think that's because the majority of muscle that has remained is slow twitch endurance muscle, which is far harder to reduce. Even with a zero calorie starvation diet, one only tends to lose muscle in the first three days - after that, the body will switch to predominantly burning fats, which you don't want. So starvation is a very bad idea whichever way you look at it.
As I said, I think your back honestly looks really nice, and if you told me that it was an athletic GG back I wouldn't be surprised!
