Product details:

4 INCH TOP OPENING 8 inch diameter. Made by craftsman and hand blown in American glass foundry - Neckless Opal Ball Shade Style. Classic opal white milk glass. Fits hardware 11790, 11792, 11792U, 11792SB, AND 11792BK. 8 inch diameter, hand made Opal Neckless Ball Shade, 4 inch top opening