IF USING OUR PHOTOS, PLEASE WATERMARK! Shown are 12mm stud earrings. This is our most popular size for both adults and kids! Earring Sizes (diameter of earring face): Regular - 12mm/.5in Medium - 10mm/.4in The setting refers to the metal part of the earring. Posts are centered on the backs of each earring. Settings are nickel and lead-free. All items are made to order in Santa Fe, Texas. Contact us for a different size, color, mascot, or design. Custom orders are always welcome!