The Power Balance Pendant is made of Zinc alloy and comes with an anti-acid washed copper chain. The pendant comes equipped with one Power Balance hologram embedded on the back under a clear Epoxy resin window for easy viewing. Pendant Size is (2.8cm) circle, (6.4cm) thick. (3.8cm) x (6.2cm) opening for chain. The chain is 60cm (23.5in).