Keen recently changed their shoes dramatically. I used to be able to walk out of REI with a size 9.5 men's Keen of any style and feel confident they would fit. Typically there wasn't even a break-in period even for their hiking boots. But now even with styles I've been buying for years, I had to go up to a size 11M to keep my toe from contacting the tip of the boot. Of course, at that size, the boot didn't fit the rest of my foot. These Montfords fit the closest to the old Keens. I used Amazon Wardrobe to get 5 different styles of Keens and kept these.