Keens run small. I had originally purchased a different pair of Keens, and had to exchange them for a bigger size. This pair was the second pair, and it's still a little tight in the toe box. I can wear them, but they aren't the best size for me. I was sized at 8 1/2 at the shoe store, but this pair was a 9. Guess I need 9 1/2 in Keen.  Also, I feel like the arch support could be better. I had Abeos before and they had more support. I do love the way these shoes look.