We have for sale a  7" Cased Green Over Opal Ribbed Oil Student Table Glass Lamp Shade Library. This was an estate find. Nice condition, but not perfect. It has a couple small chips and some roughness around the top inside lip, (See Last 2 photos). Other than that the shade is just fine. Measures a full 8" inches in diameter with a 7" inch fitter bottom, 5-1/4" inches in height.