Hypoallergenic Sleeper Studs. Dispatched with Royal Mail 2nd Class Letter. This listing is for 3pairs of clear plastic studs with rubber stoppers. The pads are 0.1 min diameter and the posts are 12mm in length. Standard ear piercings are a 20g or 18g if they were pierced by a gun. If they were pierced by a professional, the lobe piercing will typically be a 16g or 14g. Hypoallergenic plastic sleeper studs. Almost invisible, these studs are perfect for keeping newly pierced ears open. They are great when you are not allowed to wear earrings or traditional earrings may get damaged such as at school, swimming, sleeping, showering, sports, days at beach, gardening etc These are great for extremely sensitive ears