There are three basic types of lamp shade fittings: spider fittings, uno fittings, and clip-on fittings: Spider Fittings: Spider fittings are the most common type of fitting for table and floor lamps and are used with harps.Click to see full answer. Then, what are the different type of lamp shades?There are three types of lamp shade fitters: spider, clip-on and UNO.Also, do all lampshades fit all lamps? Lampshades come in all shapes and sizes and can be paired with the right sized lamp base when fitted well. The right lampshade can provide an accent to your home’s décor. You must know how to measure one to make sure it fits your lamp well. Then, what is the lamp shade holder called? Harp/Spider Fitters The spider fitter is part of the lampshade itself. It sits on top of the harp and is secured by a finial.How do I know if a lamp shade will fit?The height of a table lamp shade should be approximately the height of the base (to bottom of socket) x 60% up to 70%. The height of a floor lamp shade should be approximately the height of the base x 30% to 40%. Measure shade height along the slant.