Hello Phat!
I'm 5'8", just got another 3lbs to go to be "normal"!
I understand about the body dysmorphia thing too! I think because you're relatively "new" to being 11 stone something, it takes a while for your brain to catch up. I've hovered around 12 stone for a whole year now

but I think I'm getting used to my new body!
I think also the reason I'm looking quite slim in that photo is a do a lot of weight training and kickboxing that builds muscle and generally tightens everything, so perhaps that's why?
I also agree with the measurements and sizes! I don't think they take into account my big thighs!