Hollywood Regencytype, solid heavy brass mirror (with convex mirror).  The diameter is 12 1/4".  This brass frame is actually older than the 1950s.  It is a ceiling light fixture surround or fitting (from a recessed lamp) dating to the 1920s/30s found in a movie theater in upstate New York.  The real glass convex mirror insert is a contemporary add-on.  Spectacular look with original surface.  Please view photos as part of description.  The shipping cost reflects the weight and size box and packaging required to safely ship this item.