Inner chain is a paperclip style chain an outer chain is a thin chain. Super cute. Chain is adjustable. Outer Length can be 20" and 18" inner chain OR Outer length can be 18" and 16" inner chain Tarnish resistant, water friendly and hypoallergenic. Review all photos for details and approximate measurements. Some photos are enlarged to show details. This is not an authentic necklace set, it a designer inspired piece. Message me if you have any questions.