I'm a big runner at 6'7 240lbs. and I usually buy a running shoe with support and comfort. I usually wear a 14D and after I purchased these and put them on I felt they wore a little small. I also felt they had more of a pronounced curve towards to front of the shoe. Its a very comfortable shoe and you don't have to wear socks with these. When I ran with these I felt they didn't provide the heel striking support I was use to and it made for a pretty rough run and my legs and especially my knees absorbed a great deal of the shock. I run about 20-25 miles a week and being a bigger and heavier runner I didn't feel the Minimus provided the comfortable ride I was expecting. I would guess this shoe would be wonderful if you are a smaller, lightweight runner and you are a toe striker.