I don't remember and I ain't going outside to measure, it's pretty close to whatever the Kinyon plan called for. But the anvil isn't 4340 the dies are 4340 dave m > I used 4" x 4" 4340 un hardened for my Kinyon style hammer and > after years of almost daily use, they show very little wear. > http://magichammer.freeservers.com > > dave m > > > How tall is your anvil? > > Thanks > Mark >