So it fits in a 2 inch wide by 5/16 inch deep socket in the oil lamp. The burner opening is approximately 1.5 in in diameter. The lamp stands 6 and 1/2 inch high and is approximately 6 in wide. It's an Art Nouveau piece hand blown in Europe in about 1900 or so. It is in perfect condition.The item "Opalescent Vaseline Glass Oil Lamp Base, Art Nouveau. Socket Base" is in sale since Friday, March 8, 2019. This item is in the category "Pottery & Glass\Glass\Glassware\Vaseline\Pre-1940". The seller is "dzantique" and is located in Jupiter, Florida. This item can be shipped worldwide.