This is a fine, hard to find, White Opalescent Swirl Glass Petal Top Chimney Shade for your Angle Lamp, circa 1900s. Measures 8&1/4 inches tall, 2&7/8 inches wide at the petal top, and 5&3/8 inches wide at the base edge. Does have chip in the base edge, shown in the last picture. Thank you for your business!