Deco, 1930s vintage, square bottom prismatic glass pendant shade. This vintage shade is marked "Holophane" and "3774" on the bottom edge of the shade. This square Holophane shade measures about 11 1/2" square across the bottom of the shade, 6 3/4" high and 4" across the fitter rim. This shade has a few chips to the rim of the fitter, but they'll never show when the shade is in place.