pretty wide; I need a roomy toe box in my boots and is the reason I have such a hard time finding suitable boots (had a pair of LaSportivas that fit the bill, now discontinued, but after trying on a lot of boots-the Crispi Thor works)
as their site will tell you, if you are in between sizes- go up, they are only sold in whole sizes; they sell wool insoles that go under the liner if you need to take up some volume
