Koshini is very nice figure, especially now, when she has 5 fingers ;)

It is not easy but you can scale hands and arms (not too much). Unfortunatelly you must spend some time with joint editor. I have no time to search atm. but you should find tips on PhilC tutorial page. Remember if you scale hand, you must scale fingers either.

If you do not find solution, I'll try to make tutorial tonight.
Good luck