Made with the 5/8" sterling silver round "OU" charm on Leather oval key chain. The key chain is approx 2"x1-1/2" not including the hook and attachment which is approx 1-3/4". Available in Black or Brown Leather. Add any sterling silver charm or gold plated charm to the key chain of your choice. Just order the charm you prefer and then go to the Accessories section and pick the key chain to have it added to.