This item is a Fenton blue opalescent hobnail jam jar #3909 pictured on page 90 of, "the big book of Fenton Glass, 1940-1970" by John Walk. The jar is 4 7/8" tall with lid, 3 1/4" at it's widest body diameter, by 2 5/16" across the foot. The ruffle edged under plate is 1" deep by 6" in diameter. The set has strong opalescence on the lid finial, jar's upper rim, and plates outer ruffled edge, with the balance of the set being blue base glass. The set has no wear or damage, but the serving spoon has been lost over time. Please feel free to contact us with any questions or to make an offer.