Fenchel Shades 18 In. Top Diameter X 18 In. Bottom Diameter X 12 In. Height Drum Lamp Shade - Linen Ivory EFK9_M4RTQ14

This lamp shade has a top diameter of 18 inches, a bottom diameter of 18 inches, and a slant height of 12 inches. The vertical height of this shade is about 12 inches This attachment is called a washer attachment and is nickel in color. It is also known as a spider attachment. If your lamp has a harp, then you will generally need a washer attachment. The hole size (inner-dimension) of a washer attachment measures slightly under 1/2 inch. The drop on this particular attachment is 1/2 inch. That means, it recesses about 1/2 inch below the top of the lamp shade.