100% 925 Sterling Silver and Nickel-free - This product is made of 92.5% sterling Silver,which is perfect for those with very sensitive skin. Sterling silver is one of the brightest metals in the world, Adding brilliance to your jewelry. The 7 "7.5" 8 "8.5" 9 "9.5" 10" bracelet is long, 10 mm wide,and has a plug-in buckle with a device.weighs about 45-55 grams.