This necklace has three rows of sparkling blue rhinestones, and at 15" is collar style. (It can be clasped at shorter distances.) All of the rhinestones are prong set, so are securely held. The three rows are almost 8" long, the regular chain is 3" and the extension with rhinestones is almost 4" long. The necklace is in excellent condition, and will be shipped in a gift box.