Vintage Tiffany Style Stained Slag Glass Lampshade. This stained glass lamp shade is a unique piece that will make any room more charming. Measures 4 1/2" T x 14 1/4" bottom dia., 1 1/4" fitter top opening. Weight 3 lbs. It is in good condition with one very fine crack in green petal, and tiny scrapings at the top (really not seen but noted). See photos. Weight 3 lbs.