Intergalactic, planetary, planetary, intergalactic! These dainty Saturn planet stud earrings are sure to send you into orbit. - Measures 6mm in diameter - Hypoallergenic - Heavy 18kt Gold Plate over brass with e-coating for extra longevity ** Our pieces are plated 1 micron thick, industry standard is .125. Quality is extremely important to us, and we wanted to ensure these pieces will last and work well for sensitive ears.