MIR-109 is a set of steel mirror mounting brackets hardware in an Antique Brass Finish. The catch portion which mounts on the wishbone supporting the mirror is 1-9/16"high by 7/8"wide. The plate with the circular, or swivel, bracket that mounts on the mirror frame is 1 11/16"high x 5/8"wide. The assembly requires 1/2"of space. Set mounts one mirror.