Round Ball Stud Earrings Set, One Pair Each 2mm 3mm 4mm 5mm 6mm - Stainless Steel 5 Pairs Value Pack: 5 Pairs of Round Ball Stud Earrings. Stainless steel Pair Each 2mm 3mm 4mm 5mm 6mm. Secure pushback butterfly clutch back to secure them on your ear. These polished stud earrings feature a classic ball design.