Our Lyonese Necklaces are constructed using the traditional Kingsmail weave and anodized aluminum rings. They contain no lead or nickel and are hypoallergenic. They can be ordered in a wide variety of colors or you can contact us to do custom colors. Made with 16 gauge 3/8" anodized aluminum rings. 19" is the standard length for these pieces, if you need a different length just let us know.