Our Xanadu bracelets are constructed using a stretchy variation of the barrels weave and anodized aluminum rings and EDPM rubber rings. The aluminum rings contain no lead or nickel and EDPM rubber rings contain no latex, they are hypoallergenic. They can be ordered in a wide variety of colors or you can contact us to do custom colors. Since they stretch they do not require any other findings and so are easy to take on and off. 7.5" is the standard length for these pieces, if you need a different length just let us know.