I ordered a black pair, 10.5 D.  I usually wear a 10 D but wanted a little extra space for heavier socks and for when my feet expand a bit while walking distances.  The fit is perfect.  I have very flat feet and overpronate badly, along with frequent heel and plantar pain and inflammation.  I can feel the extra stability these give me.  I've been having pretty bad achilles tendon pain recently, even with my orthotics, but after several walks using these shoes and my orthotics and I haven't had any of this.  I highly recommend them.  I just bought a 2nd pair, in white.