These festoon links are striking! Hand this link from a finished neck chain as a beautiful centerpiece or drop them from earring findings to create a nice set. The cable chain is .7mm and the large closed ring has an inner diameter of 1.9mm.You can slip these on earwires easily, but you may need to use a larger jump ring to connect them to finished chain. To find out, check what the outer diameter of the end jump ring is on the chain to see if it can fit into the small inner diameter on this link.