It is 11” and not 13”.  It is more of a beige than white as described on the site - and that mattered to me because it’s almost the same color as my wall and I was hoping for white to give it contrast.  The bottom part looks plastic white and when the lights are off it just looks cheap and not nice.  Would work for a hallway and perhaps a bathroom but not for the room I had in mind.  Returning it.