16" across the top and bottom x 12" high. Drum shade shape from the Springcrest Collection brand. White polyester blend fabric, rolled edge detailing, no shade lining. Chrome finish spider. The correct size harp and a finial are included free with this shade. Simple and stylish, this hardback lamp shade comes in a classic white polyester blend fabric. The drum lamp shade shape is ideal for adding modern style to your favorite lamp base. Drum shade from the Springcrest Collection.