This listing is for three (3) leather necklace cords with extender chains. Each chain is 18" long, plus there's a 2" extender chain added for a total length of approximately 20". Each necklace chain fastens with a lobster-claw clasp. There's a US Quarter coin next to the chains in several of the listing photos, just to give you an idea of the size.
Please contact me through Etsy Conversations if you have any questions, and thank you for viewing this listing! -Pat