Our Utopia bracelets make a great base for a charm bracelet. They are constructed using the traditional Shaggy Loop chainmail weave and anodized aluminum rings. The rings 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. 7.5" is the standard length of these pieces but if you need it in a different length just let us know.