While searching for large wooden balls for a life size project I have in mind, I found an amazing sculptor, Keith Holamon. He scours the forest floor for tree trunks and has built a custom hoist and lathe to sculpt wooden balls from the trunks. "Size matters" as he says and clearly proves with the finished balls measuring anywhere from 20" to 38". Truly pieces of living art. Impressive I think. Checkout his video