To put on a pair of threader earrings, simply push one end of the earring through your ear piercing until the earring comfortably rests on either side of your earlobe. Typically, there are curves or designs that indicate the location of the middle of the earring. The middle is most commonly the part of the earring that should rest in your ear piercing, with each side dangling.
If the earrings have different designs for each side, the more ornate or gemstone-focused side is generally the one you will want to wear on the outside of your earlobe farther from your neck. Straightforward metal,
gold or silver threader earrings can often be worn in either direction.
When in doubt, wear your threader earrings in any direction that's comfortable, as they lend to more flexible styling.