In reply to @ndyM@rsh@ll:
> Smaller hands are likely to have correspondingly weedier pulleys and narrower tendons so the impact of climbing is spread over a smaller area, so possibly a higher risk of injury for big people with small hands.
I always felt the opposite: people with larger hands tend to weigh more, but their tendons and fingers arent necesssarily proportionally bigger, so there's more force on a smaller area. Ive often noticed how heavier ppl really burn through skin on their tips
As another consideration, grades tend to reflect the difficulty for the "average" sized hands. eg. indian creek utah where the grade is defined mainly by the size of the crack: if you have smaller hands then you'll certainly be doing smaller cracks, and therefore higher grades on the YDS.
Of course it's all relative, and these same ppl could well struggle on a "fist crack" which their hands dont fit into, even though it has a lower grade.