Only a select few pearls from each harvest meet MIKIMOTO’S high standards and are deemed MIKIMOTO PREMIUM. Near perfectly round and harmoniously matched with superb luster and fine texture. Meticulously selected, these pearls proudly represent the originator of the world’s finest cultured pearls."PREMIUM" engraved on back of 18K white gold clasp with Akoya cultured pearl. 7-5.5mm pearls. A quality. 16 inches long