fenchelshades.com 18" top diameter x 18" bottom diameter 11" height cylinder drum lampshade usa made (white) fenchelshades.com this lamp shade is not an imported product. it is made with pride in the usa, and construction does not begin until you place your order. by request, you may specify changes to the dimensions, covering or the hardware color. (extra charges may be necessary.) this shade is equipped with a washer fitter. this is the most common fitter type. it consists of a small washer with an inner diameter hole size of approximately 1/2". the washer generally rests on the top of a metal harp above the light bulb and is held in place by a screw-on finial.the outside of the lamp shade has a fabric covering. the inside is a white styrene (white plastic). the top and bottom of this item is adorned with a 1/2" band of single fold lampshade trim. the trim is the same color as the covering.