I wanted to replace my older pair of Kahanas and ordered the same size thinking they'd fit.  These run a little small.  I can wear them for a little while if I don't wear socks.  If I wear socks, they're too short in length and a little too tight in the width.  Order at least half a size up, one full size up is better.  I couldn't return them so they were a waste of money for me.  I wear them to the dog park sometimes but will probably donate them or throw them away soon.  I bought a pair of Saucony instead of these and am happier with those.