Necklace chains are made from stainless steel. They are anti-allergic, unfading, nickel and lead free. Pendants are made from copper and cubic zirconia Necklace is approx. 35cm with 5cm extending chain Bracelets are approx, 15.5cm with 3cm extending chain Please do not hesitate to contact me if you have any questions :) Delivery is not tracked. Option to upgrade to tracked delivery can be done at checkout.