<P> Lampshades are classified in four basic shapes: drum, empire, bell or coolie depending on their shape . A drum or cylinder shade typically features vertical sides, sometimes with a very slight incline where the top of the shade is slightly smaller than the bottom . A slightly greater incline produces a "floor" shade which is not far from the "true" drum profile . As the slope of the side of the shade increases, the design moves through the classic empire shade (or variation with straight or bell - curved sides) on towards the more pyramidal - style shape of a coolie shade . </P> <P> Beyond the basics, lampshade shapes also include square, cut - corner, hexagon, gallery, oval, or scalloped shapes . Square, rectangular and oval shades appear to have these shapes when viewed from above or below . This also includes hexagonal shades and cut - corner shades which appear like square or round shades with the "corners cut off" or indented . A shade with a gallery can be of any shape but has a distinct strip around the bottom of the shade . </P> <P> Lampshades are made of fabric, parchment, glass, Tiffany glass, paper or plastic . Common fabric materials include silk, linen and cotton . Fabric shades are reinforced by metal frames to give the lampshades their shape, while paper or plastic shades can hold their shape without support . For this reason, paper shades can be more fragile than fabric shades . Darker shades sometimes add a reflective liner such as gold or silver in order to maximize light output . </P> <P> A "fitter" describes how the lampshade connects to the lamp base . The most common lampshade fitter is a Spider fitter . Spider fitters are set on top of a lamp harp, and secured with a finial . The harp is typically seated below the socket and two arms rise up around the light bulb and join at the top, where it provides resting support for the spider fitter itself . The fitter is built into the lamp shade frame itself and sits on top of the harp . Other fitters include clip - on (for either regular bulbs or candelabra bulbs), Uno fitters which are attached to the lamp itself below the light bulb, and notched - bowl fitters which support the use of a glass reflector bowl . </P>

What material is a lampshade made out of
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