I have to agree about the stan sx2. the are VERY adjustable.

I have had a couple thumb releases and used many more. If i were you, being that you have small hands, i would look for a release with a more straight handle design so it is easy for you to get your finger around the trigger. Right now im using a Carter Fits Me and im liking it pretty well, but... for your hands i would recommend the Fits Me Too. They are relatively compact so i believe you would have no problem with it.

Pro diamond- My experience with the pd wasnt so great. I have used a couple different ones (not sure which) and they changed my anchor way too much. The head on one of them was soo long that i was having trouble anchoring period b/c i couldnt get locked in. I like the operation of the release and everything like that, but it just seemed to modify my anchor WAY too much. Ive shot other tb releases and have no problems with them. Im considering getting a 360...

Here is the Carter-
http://www.carterenterprises.com/products/fitsme2.htm

Here is the Tru-Ball-
http://www.truball.com/ST360.html

Derek