16 inches at its widest. 7 inches deep/tall. 2 inch inside diameter on the fitter opening and 2-3/4 inches outside diameter of the fitter opening. This is a vintage glass torchiere floor lamp shade used on floor lamps. Most likely the ones that used Mogul light bulbs but I'm not 100% positive. The shade is made of glass and has an embossed cream and white design. The product is described as being in very good condition with no breaks.