If you’re a banjo player, you have patience! … Oh wait… I got that wrong! It’s the people around the banjo player that has patience! Sorry for my mistake!
I have a J.D. Crowe Blue Chip (Large) and a National (also large) and they both fit about the same. Honestly, I prefer the National for tone but the Blue Chip for comfort. I agree with Mark on how comfortable it is but I think the National sounds better. I play Dobro though and not banjo, so the sounds could be completely different. Those are my only two thumbpicks by the way.
Good luck and let us know what you decide.