14k Yellow or White Gold Cross Stud Earrings with Child Safe Screwbacks These earrings are made of solid 14k gold and are stamped "14k". These adorable earrings make a great gift for children but can be worn by anyone with a bit of whimsy. Earrings measure 6mm (0.24 in) x 8mm (0.31 in). Please note that the post measures 8mm, which is shorter than a standard post.