Not really. At least from personal anecdote, it seems more likely it's due to her losing a bunch of weight. Most of hand bulk is bone structure which is mostly

Not really. At least from personal anecdote, it seems more likely it's due to her losing a bunch of weight. Most of hand bulk is bone structure which is mostly static after puberty. The skin does definitely change though, and that plus the weight loss IMO explains everything. Edit: For context, I started hormones a week before my 20th birthday, almost 13 years ago. Long enough ago that I've seen the full effects I'm going to, and it was after most of puberty.