I have very small hands but still prefer 50's neck. The R9 size is just about perfect. I have U shape big baseball bats in Strats and Tele's but I'd rather have a .880 to .900 neck (1st fret) in Gibson and a .840-880 (1st fret) neck in a Fender.
The 60's neck is probably the smallest neck I'm comfortable with, barely comfortable...