HEIGHT = 9 1/4 inches
WIDTH = 6 1/4 inches
VALUE = $100 - $200

NOTE 1:
This is a Doorstop Lamp and not a true Doorstop This piece is always found with the U-Groove protruding from backside because a Light Socket on a threaded stem is attached to the U shape Protrusion via 2 nuts, one on each side of the U

NOTE 2:
Some commonly thought to be doorstops are not doorstops at all but Doorstop Lamps.

The Critical Characteristics of a Doorstops Lamp is that they look like what we know as a well known doorstop from the Front. However, they always have a U-Groove on the back to hold the Electric Bulb.

This U-Groove holds a Hollow Threaded Rod secured by 2 nuts that sandwich this metal projection. The Light Scocket screws onto this threaded rod and the electric chord goes thru the hollow part of the rod & plugs into the wall. Probably, the main reason these get confused with actual doorstops is that usually the Threaded Rod, the Bulb & the Electric Chord are missing and the only distinguishing feature is that U-Groove protuding from the backside