LOL, my late husband who taught himself at 7 to play piano had small hands for a man. Then in his teens he taught himself guitar, had to find one with a small neck. As an adult he played a Peavy narrow neck guitar, and a Korg full size keyboard.
While hand size might make it easier to play, small hands don’t stop any one from doing so. A 10 yr old on the Voice, a genius, ready to start college, played the piano and sang very well this year.
My great granddaughter started taking piano lessons at 10, so you know her hands were small.
I found a CCW piece that fits my small hands. You just have to want it.