I read a lot of WONDERFUL reviews of these shoes and was very excited to buy a pair. I have a pair of barefoot running shoes by another brand, but the trails where I live have a lot of loose rocks. The treads on the Neo look great for the conditions. The sizing is European, and translates into only whole US sizes. I typically wear a 7.5 in shoes. The 37 (7) was a bit too short but the width fit well. The shoes fit, but just walking around my apartment in them, I felt that if I was running downhill, my toes would uncomfortably jam into the toe of the shoe. I also don't think thick socks would be an option with that size. I exchanged the first pair for a 38 (8) and the shoe was much too big - too long and too loose. So I think if you wear a half size, you may have to try another brand. It's unfortunate because looking at both pairs I ordered, the shoes are very well made. They are light, have great treads, tie tightly and have a nice fit around the ankle.