Post backs for pierced ears. Composition - brass crystals. Measurements - 4" (approximately). Imported. PLEASE NOTE - Please follow our tips to prolong the life of your jewelry - Remove jewelry before coming in contact with water and working out.. Wait to put on your jewelry until your lotion, makeup and perfume are completely dry.. Do not use chemicals, bleach or oils, as this can affect the finish.. Store each piece of jewelry separately in individual pouches to avoid scratches..