I cut a chestnut oak out on a cut the other day with a 4' trunk. Surprised me- another cutter and I were talking for a moment across our strips, he said "hey, how big is that stump anyway? By the way you're sitting on it, why, it must be pretty good sized" Used an old 12" wedges flipped it over across the stump ( no tape on me) and surelymeasured to 4'. Solid too. Heavy log right there. I bucked the top off- had a wedge in it, no way I could get that wedge back out, unless I really wanted to bang on it, maybe dislodge the log, while I was way down in that drain. Lost that wedge, maybe the hookers will get it one day. Maybe they'll donate it to the hooktender, for SlowPs benefit.
Pretty good, still solid, for Appalachians.