Make her 18th birthday one to remember with the perfect keepsake necklace. Made from sterling silver, this necklace features an 18th birthday number pendant and comes on a chain in the length of your choice from 14 to 22 inches - depending on her individual style. Go for 14 to 16 inches if she loves choker necklaces, or longer if she wears them loose. We also have this necklace available with a number 16 if you have a second daughter whose special birthday is coming up.