I wear 11 mens in Samba or Adidas Campus quite often but 11 mens are really tight in these types. The next size works better. I was able to get the 11 to work with shoe stretch, but it was very, very tight and had an odd feel to the sole's balance in relation to my foot. Other than that, such a great lightweight shoe with just a touch of support. I really like them for training and parkour/freerunning. Just pay attention to the size.