This one doesn't answer my question, but another person who had it worse in their hands and not at all in their legs.
http://forum.cmtausa.org/viewtopic.php?t=2473

My wedding ring is size 3.5. Nobody I've ever met has skinnier fingers than I. I've always had problems doing small tasks with my hands, like hand sewing. Obviously I need to do more research and get myself back to the Neuro. But interesting. I really am curious about the splints.