The lampshade is designed to fit over your socket and fasten on the lamp Uno socket. The inner diameter of slip Uno is 1 7/16. Why upgrade to these shades? Because your home is worth it! These shades feature the finest premium shantung fabric. Durable upholstery-quality fabric means your new lampshade will last for decades. It won't get brittle from smoke or sunlight like less expensive fabrics. Heavy brass and steel frames mean your shades can withstand abuse from kids and pets. It's a difference you can feel when you lift it. Who is this shade for? For homes, hotels, professionals looking for a quality product, or anyone seeking excellent value in their home decor. It the designed to fit over your socket and fasten on the lamp Uno socket. The inner diameter of slip Uno is 1 7/16 lampshade 9 top x 18 bottom x 13.5 slant height top-shelf shantung lampshade, found in better lighting showrooms. Durable Hotel quality shade. Includes everything you need to use on an uno fitter lamp: 11 harps, harp-to-uno adapter, and finial cap. Please review all images to verify this shade will fit on your lamp base.