FenchelShades.com Lampshade 10" Top Diameter x 12" Bottom Diameter x 8" Slant Height with Washer (Spider) Attachment for Lamps with a Harp (White) Top Diameter : 10" Bottom Diameter : 12" Slant Height : 8" Attachment Style : This Lampshade Works with Lamps with a Harp (Not Included). The Washer Attachment has a Standard 1/2" Drop, or Recess, from the Top of the Shade. Fabric Exterior, White Styrene Interior