I have another pair of New Balance tennies so I thought I had an idea of how they fit.  Wrong.  These run small and the toe box seemed to narrow very sharply on the big toe side.  Plus, if you are thinking that there will be any give in the footbed or sole, wrong again.  These were incredibly stiff.  I had to send them back.  They look better than they feel.  I cannot imagine a comfy walk in them.

My foot is somewhat on the narrow side of medium.