304 Stainless Steel Big Hoop Earrings, Hypoallergenic Earrings, Ring Shape, Rainbow ColorSize: about 44~46mm in diameter, 2mm thick(12 Gauge); pin: 0.7~1.3x0.68mm.âHypoallergenic Hoop Earring: Made of Stainless Steel, our earring are nickel free, which are gentle to skin. These earring are ideal for sensitive ears. âThese kind of earring are fashionable and elegant, they are great for anniversary, wedding, engagement, birthday party, dating, daily wear, etc. They really make you eye catching when wearing it.They are also really a wonderful gift for family and friends.