ive seen lots of big rubs..most are little saplings from young bucks or saplings bug bucks TORE to pieces and i got there while it was fresh and could tell...ive always heard only big bucks can rub a big tree..i think thats true...a little buck can try but when you find a rub with a 6 inch dia with the bark rubbed off id bet its a big un...ive seen a few rubs about 6 inches in diameter.....one buck i seen that made rub on a pine tree about 7 or 8 inches in dia in a swamp area ....he was a BEAST....probally.....140-150 class...but i duno im not good at classing them......about an 16-20 inch spread atleast a BIG 8 pt...but i seen him at 100yds...its probally more points than that....thats what i could count...he was big....the other was a tree about..6 inches in diameter...and this buck was trotting at 100 yds or so and i could visibly see with my eyes that his rack was wider than his ears....he had a good rack...but i couldnt see for sure....both rubs i never found any more that big in the same area...mostly tore to pieces smaller trees...and the big rub always seems to be freshened up....but thats just what ive noticed on them 2.....