I've never tried the 201 last, but AE in general tends to run .5 down fromBrannock. I would think the neighborhood of 43 is a good place to start. P2 runs .5 big, in my experience, and U will run .5 small. But an exact determination of which last works best for you really depends on the shape of your foot.It sounds like you have a slightly wide forefoot, but what shape and how long are your toes?From Whom are you ordering? Perhaps they can help you zero in more.