I have at least 5 pair of New Balance for running and this pair is the only which is on the short size. I usually buy them in 7 1/5 which I did there and I'm disappoited. It obliges me to use a very thin socks. This model is very similar to the WT 610 (at least 4 years old) but the fabric is thicker. They remains very light with a good grip. They do not have a lot of heel (which is the way I like it) but more than the barefoot type/vibram.