I bought these shoes to wear to train in martial arts. My shoe size is 7.5. When I first tried the shoes I was somewhat concerned that the shoes were a bit too big but that was because I was not wearing socks. After training for 2 hours in them with a slightly thicker socks (bc even thin socks still felt like the shoes were a little lose), my feet felt great. I didn't suffer from any blisters. The shoes really griped the floor and my performance was great.