Clear glass is frosted inside, and signed by its maker "Holophane E-100".   Likely that was the catalog pattern number.   

Shade is 7.5" wide and 5.5" tall.  Installed on the fixture the whole is 49" tall but adjustable.  

Ships from Los Angeles.

Holophane is a manufacturer of lighting-related products founded in 1898 in London, England. The company is still UK-based . Holophane is noted for its glass reflector/refractor. Holophane has been integral in the Illuminating Engineering Society of North America since its inception in 1906.

The hallmark of Holophane luminaires, or lighting fixtures, is the borosilicate glass reflector/refractor. The glass prisms provide a combination of uplight and downlight to illuminate any environment evenly without creating dark spots or glare. This ribbed glass shade/reflector, called "Holophane" or "Holophane style/type" is licensed and copied throughout the lighting industry.