This item is a Fenton blue opalescent mini hat vase form #389 pictured on page 93 of, "the big book of Fenton Glass, 1940-1970" by John Walk. The piece is 3 1/2" tall, 2 7/8" at it's widest diameter, by 1 5/8" across the foot. The upper rim has strong opalescence that flows down the hobnails to the bottom three rows. The vase has no wear, damage, or signs of use. Please feel free top contact us with any questions or to make an offer.