3 Pairs 925 Solid Sterling Silver 2mm Tiny Ball Stud Earrings Cartilage Studs This listing is for 3 pairs of 2mm Tiny classic Solid Sterling Silver Ball Stud Earrings. Brand new! Never used or put on! 2mm = 0.08 inches. Solid sterling silver. Very Small for those looking for tiny size studs. Heavy Duty Secure Earring Backs.