This is such an odd thing....the left shoe fit to perfection, entirely comfortable and exactly what I was hoping for, but the right shoe for some reason impinged on the middle-side of my right foot. I thought maybe it was just that particular shoe, so I ordered another pair, and it was exactly the same. It may be because these shoes are narrow in cut, and my left foot is narrower than my right (although I have not measured any difference). I have been wearing Asics for years and years...always size 12 even though in every other shoe I am an 11..normal width. My last pair that I have been trying to replace are Kayano 18's. The thing is, the left foot felt just as good as these old shoes....the right...not wearable. So sad. Amazon was GREAT in allowing these to be bought and returned...twice!! I will keep on looking!