I have tried many grips on J, K, L and N frame guns due to my small hands and short fingers. For J and K/L frame round butts nothing fits my hand like the Pachmayr Compac Pro grips. They are not the best looking, in my opinion, but are the extremely comfortable to hold and shoot.
J Frame 940, my EDC
K Frame 19-5 DSS
K Frame 66-5
L Frame 696
L Frame 986
I just wish they made the Compac Pro for N frames.