If you fit Nike runners well, these will probably work for you. (I have short wide feet, so I don't wear Nike!) I ordered one size down as instructed, and the footbed is a bit long bit of room in the toe pockets) and the uppers are REALLY tight width wise around the foot. Now, most Vibrams feel REALLY tight at first until they settle in, so I'm giving these a breaking in period because I DO love that the sole really is a good compromise between a traditional runner and a barefoot shoe. Long running workouts on concrete or old gym floors with windsprints were a bit too intense on the other models, so I got these. They have just that little extra bit of structure and cushion while keeping everything we love about a barefoot shoe. So I really hope the uppers will relax enough to be comfortable for a good workout. My favorite Five Fingers were all super tight at first or dug in someplace and made me think "I can't possibly wear these" but now they're all amazing, so I have faith! Recommend Vibram produce another run of these, but in a wide option as well. I would buy several.