Materials: .925 sterling silver & Sapphire High Polished  2-1.3mm Sapphires The model is wearing two 6.5 inch bracelets put together to make a necklace.  For men we recommend three 8 inch bracelets to make a necklace.  For a tighter fit, we recommend two 6.5 inch bracelets to make a necklace for woman & three 6