This is a ribbon-motif pendant top. The chain is not included. Please use your own. The size of the round clasp that the chain passes through is approximately 5mm in diameter. I used it once at a friend's wedding. I don't usually wear necklaces, so I don't have many opportunities to use it, so I'm selling it. Please understand that this is a used item and has been stored by myself. It will be wrapped in bubble wrap and shipped in simple packaging.