I RECEIVED THESE FOR CHRISTMAS.  I WEAR 9.5 AND THAT IS THE SIZE I GOT AND THEY FIT ME PERFECTLY!!  GLAD I JUST WENT WITH MY GUT ON THE SIZE BC THE REVIEWS ARE SO MIXED.  I AM 5'8 AND 145LBS.  MY FOOT IS NOT WIDE.  HOPE THIS HELPS YOU WHEN CHOOSING YOUR SIZE.  THEY ARE SUPER COMFY AND SO WARM , GRANTED THE WEATHER HERE IN NY IS ONLY AT ABOUT 35DEGREES.