I'm 5'8 and have small hands. I use 12" 4-roll gloves (TPS R8). I used to use 13" gloves that were tighter fitting (line One75's, CCM Vectors, etc) but they would still feel a bit loose. I like them super tight at first and then they break in and feel awesome.
If you do end up with 10" gloves, make sure there's not too big of a gap between your elbow pad and your glove cuff. I use older JOFA style elbows that are really long, but you might also consider slash guards.
The other thing to consider is that some junior gloves don't have as much padding as senior models. I look for plastic inserts in the fingers and backroll, thumb lock, etc.
I used Supreme One75's for a while but they don't have much protection and my fingers were getting beat up. Great gloves for the money I'd recommend are:
- Bauer Vapor X40
- Bauer Pro 4 Roll
- CCM 4 Roll Pro
- Warrior Bully