Hello, everyone! I've recently rekindled my love for calligraphy after a horrible falling out due to school life (ugh) and I'm back to the beginning! Unforunately, the speedball plastic oblique holder is no longer working for me. (I suppose it was never really a good option to begin with, after reading through some blog posts about why a customized holder is so much better). I have finally decided to get myself a prettier, more comfortable holder. I am thinking of purchasing a carrot holder, in particular, because not only do I want to loosen my grip, but also because my fingers fatigue very fast (mom did say arthritis runs in the family

) I've been practicing a more relaxed grip by holding a pencil in my non-dominant hand, and hoorah hoorah, it's working, but the pain the plastic holder brings me is still there.
Now, my real question is, just how do I know which grip diameter is suitable for me? On websites, I've seen carrot holders with grips that range from 13 mm to 16 mm, and not having touched them for myself, I'm not really sure which would be a good diameter for my hand.
Appreciate the help!