I felt the kennetreks were pretty narrow for my standard size 11. I'm not a true wide, but I'm close enough that it can be a problem with some shoes. I'm under the impression that all the pacs use the same bottom mold. Maybe, maybe not, but I wasn't about to order three or four pair and then deal with returns.
I got some Schnee's this season and bumped the size to 12. They were a little big and I just added a cheap felt in-sole to the liner and now they fit like a glove.
I thin kit might a crapshoot on finding ones that fit and you might have to be prepared to size up or try several different makes.