This is a fine Museum Quality Tiffany Studios Reproduction of their Leaded Glass Susan Flower Lamp Shade. This beautiful Leaded Glass shade is 20 inches in diameter and 8 inches tall with a 4 inch aperture (actual 4.5 inches) and contains 1212 pieces of wonderful glass, primarily Youghiogheny, Uroboros and Bullseye glass. The leading is just fine throughout. Check out the photos! The shade is pictured in Duncan's book, "Tiffany Lamps & Metalware" as shade number 1529. The clearer background glass is gorgeous pieces of fractured glass. If you have the base, this may just be the Leaded Glass Shade for it!!