MacBeth Evans Monax Moon stone petal ware slip shade pudding cup bowls lighting shade replacement . These vintage glass lamp parts , are 6 inches in diameter across the top , stand 2 3/4 inches high and have a 1 5/8 inch shank fitter . Designed to slip between the socket and the socket cup on some Vintage chandeliers and wall sconces . The bulbs then were installed to help hold the shades in place . Great repair or replacement parts . The Fitter edges do have some rough areas .