Nice Shoe, Run Very Small
I wear size 9 US street shoe and got these in 8.5. I could barely get them on. Returned them for a 9, but there is still a pretty painful pressure point on both big toes. My feet are about average--not too wide or narrow, no weird protrusions. After about 15 times at the gym, they've stretched a bit. Excellent performance despite the pain; we'll see how it goes when I've gotta wear 'em for a couple of hours on a route.