E97DSB Round Duplex Receptacle Cover, Diameter: 5", Non-Metallic DARK BROWN QTY 2 See pictures E97DSB Thermoplastic DARK BROWN Colored Duplex Cover Diameter of cover seen from the top is approx 5 11/16 inch OD . Diameter of round underside that covers outlet is Approx 4 3/8 Inch OD . There is also a grey adapter / screw ring that has approx 4 9/16 inch OD