These Clarks were waaaay too small.  I wear 11 1/2 shoes consistently and I wear 11's in Clarks as they run about 1/2 siza larger than most.  These shoes, however run very small.  They fit like a 10 1/2 and they were really stiff and kind of "clunky".  Disappointing... as I like the style of the shoe.  My advice is to order at least a full size up... even then, they might be snug.