Sold By the Pair. Known as ear threads or threader earrings, these sterling silver earring components are a great alternative to traditional earwires. These strings consist of fine 5-inch chain with a 20mm post at one end and a 3.2mm jump ring at the other. Because the chain is in your ear and not a stiff post, these earrings are incredibly comfortable. Use the post to thread the earring through your ear and pull it until it is as long or as short as you desire! Add your favorite charms, dangles and beads for a whole new look.