he pendant shown is on a black cord necklace measuring about 18 inches long, but you can also choose to have the pendant strung on a silver-tone chain of any length. The 18" cord necklace and chain necklace necklace will have a lobster clasp and jump ring for closure. If you would prefer silver-tone cable chain, please use the drop down menu to select your desired length. Please let me know if you'd like a custom length chain by adding a note at checkout, and I'd be happy to adjust it for you free of charge! ♦ For reference, 18 inches = 45.7 centimeters (18 inches is the most popular length).