You can make your own necklace cards in addition to earring cards. Follow the directions to make earrings cards. Then cut two equal slits in the top of your card like shown here. At the end of the slit you are going to punch two small holes. You can use a brad nail, or a hole punch. You want the hole to be just smaller than the chain. Large enough for the chain to go through but small enough to keep it in place. Voila!