I normally wear a 7 or 7.5 W (my pair of Vionic dress slides is 7 M and loafers 7.5 W--and in some shoes I'm an 8W US or 38W EU), but these are offered only in M, so I ordered 8 M. They are comfortable, but after about 2 wearings there is at least 1/2" of sole protruding beyond both my toes and my heels. In fact, when I'm standing my entire forefoot including half the big toe joint is fully visible. If I tighten the strap, my bunionette & pinky toes feel squashed. The arch support is very firm, which is a good thing for my flat feet, and the footbed is cushioned enough in the forefoot that the undersides of my toes don't feel bruised (I often need to pad other shoes' insoles, including Vionic loafers, in that area). These aren't cheap, but unlike Finn Comfort or Mephisto they won't break the bank either. Since I've worn them, I can't return or exchange them, so I will just order another pair in 7M and hope they fit as well as my dress slides. The fact that they run long is the reason I've removed a star.