Outsole is 11.5 inches. I wear 7.5 in Redwings Traveler. Although people claims the Wolverines run big, I find them to bee quite (and maybe just a tad big) true to size, unless you have narrow feet. If you do, you should size down (and these would fit an 8.5, maybe even a very narrow footed 9?).
I hope that's helpful.