For sale is a pair (2) of vintage holophane-style prismatic glass lamp shades that are 3 1/2" high, 6" wide and have 2 1/4" fitters. Some very light wear, as can be expected, and roughness along the fitter edges, but absolutely no cracks, chips or repairs to the main shade part.
Though unmarked, so I'm not sure of the exact origin or era, but both do fluoresce under a blacklight. So they are definitely older rather than newer.