These anchor necklaces fit together perfectly. One side has an anchor and the other has the space that the anchor fits into. These are perfect his and her necklaces or best friends necklaces. This is a coin that has been cut by hand with a small jewelers saw. Two 20" thin chains will be sent with this order. However, if you would like different sizes offered below please message us immediately after ordering. We offer various chain sizes from: 18" thin 20" thin 24" thin 20" thick 24" thick Key Chain Adj Black Cord