@Gavrielle66
First,it is important make an effort to lose any significant excess weight, then exercise, active lifestyle and then the hormones help redistribute fat to make more curves in the right places....
Many transitioners experience some loss in height, but of course as one gets older usually there is a loss of height as anyway. Also shoe size may go down a half size, perhaps a full size or so. Finger ring size can also be smaller.
Dramatic weight loss by itself can reduce almost all of these measurements so if one is significantly overweight that is always a very good place to start, even well before hormones.
Danielle