From top to bottom, this measures 20”, with the handle 15” across, and a 2” bore.
Presumably this at one time was used for post and beam construction in Southern Illinois. It was recently pulled from the home of my late parents in that region. I don’t know how old it is, but my dad bought it roughly 40 years ago. He had a love of going to rural auctions and sales, and coming home with things that really caught his eye.