Aspen Creative Corporation 4-5/8 inches Height x 4-1/4 inches Diameter. 2-1/8 inches Fitter Size/Alabaster Glass Replacement Shade in the Light Shades department at Lowes.com
Vintage Hardware & Lighting - 4" Fitter Size Close Ceiling Pendant Light (14-PL4-OB)
Upgradelights® 10 Inch Green Glass Cased Lamp with 2 and 1/4 Inch Fitter - Amazon.com