Gorgeous colorful Niobium Byzantine necklace.  Measures approximately 5/16" wide by 18 1/2 to 21 1/2" in length.  The links at the end allow you to choose any length between 18 1/2" to 21 1/2".  Simply clasp the stainless steel lobster clasp where you'd like it.  Niobium is a metal as strong as titanium and is hypoallergenic.