These are small pocket opera glasses. The brass body is covered with beautiful greeen enameling. Magnification is X2, enough for a closer look at the performers while still allowing most of the stage to be seen The original green leather case is very good condition with both clasps working. Exit eyepiece diameter: 10 mm. Objective diameter: 20 mm. Fully extended height: 3.5 cm. (1.4 inches)