"If you love the upscale looks of pleats, our mushroom pleated lamp shade over styrene is perfect for you. There are so many color and pattern choices you can pick a different one for every room. This contemporary take on a pleated lampshade, and is an excellent complement to all your existing home furnishings. The Washer fitter sits on top of the harp and is secured by a finial. The washer is a solid brass. Made from high-quality pleated cotton over styrene backing. Measure the height of the shade along the slanted edge.