my bad guys, I mean they have a 10-12 inch diameter! Not ten inches around, I dont have a D-tape to verify but they look to be about that size. There is nothing in the pic to gauge size I realize that, but the third tree on the left is about 8 inches in Diameter, so that should give you guys a gauge.
There are sumacs here that we measured 22 inches with the D-tape, and about 56 feet high with a alitimeter. That is some serious sumac, and it was identified by a tree expert. I am not a tree expert, I know the basics, but both sumac and black walnut have similar bark when they get older, and they have similar leave counts, one is offset and the other is not, but I can never remember which is which, but it really doesnt matter. Either way they are on the harder side of the wood hardness spectrum, lol