December Birthstone Natural Tourmaline Beaded Bracelets, with Brass Cable Chains, Faceted Round, Golden, Size: about 7-1/4 inch(18.5cm) long(excluding chain extender), 0.08 inch(2mm) wide, chain extender: 2.36x0.12 inch(60x3mm), beads: 0.12 inch(3mm).