I'm 21-and-10-months, and I started HRT at 21-minus-4-days. My testosterone is dead; however, my estradiol dose is so low this is the only part of me I can say estradiol changed so far.
I don't have any reliable measurement and am feeling too lazy to take any (whaaaaat? ._.) but since I was -losing- weight all the time, I can testify that it's not fat. My hip bones have grown a bit. Not a ton, but a bit. I had those jeans that fit really perfectly, bought a few months before beginning HRT, and after a while, they just hurt too much at the hips to be worn. Now I lost a little bit of extra weight, so I can wear them again if I'm out of clothes, but they still hurt.
Oh yeah, uhm, some numbers I can provide. I'm 165 cm (5'5") high, and currently weigh a little over 130 lbs. Looks like it might be 132. Gotta love precise scales. I probably weighed about 10 or 12 extra pounds when I started HRT.