Upgrade your lighting with this clip on lampshade featuring a stylish scalloped design and fully lined hardback interior. This empire shade enhances a variety of lamp bases. Easily clips onto a regular light bulb with no additional hardware needed. How to Measure Lampshade: First, measure across the top of the shade (4 Inches). Then measure across the bottom or base of the shade (6 Inches). Finally, measure the slant height (5.5 Inches).