Description: Blue opalescence hobnail glass lamp shade. The lamp shade is approximately 7" tall with ruffled top. The base of the shade is 4 3/4" (outer diameter of rim). The inter diameter of the base rim is 3 3/4".
Manufacturer: Unknown. (Fenton made a lot of this type of glass.)
Condition: Minor roughness on inside of rim. There are a couple of minor imperfections (bubbles) that look like part of the manufacturing process.