Designed with its smooth and wide surface, this product can be an accessory to match with your clothes, which is drop-resistant and wear-resistant since it has strong hardness and high performance.You can use this product for function performing and data sharing since it is convenient to use and easy to operate, which can be used without any power supply.Made of stainless steel material, this product is durable and long-lasting.There are eight sizes that you can choose from.It can apply for Android NFC phone.Item Name: NFC RingMaterial: Stainless SteelFeatures: Sensitive, Fashionable, Electronic ProductSize Details: Size: US 6, Circumference: 5.2cm/2, Diameter: 1.6cm/0.6 (Approx.)Size: US 7, Circumference: 5.4cm/2.1, Diameter: 1.7cm/0.7 (Approx.)Size: US 8, Circumference: 5.7cm/2.2, Diameter: 1.8cm/0.7 (Approx.)Size: US 9, Circumference: 6cm/2.4, Diameter: 1.89cm/0.7 (Approx.)Size: US 10, Circumference: 6.2cm/2.4, Diameter: 1.98cm/0.8 (Approx.)Size: US 11, Circumference: 6.5cm/2.6, Diameter: 2.06cm/0.8 (Approx.)Size: US 12, Circumference: 6.7cm/2.6, Diameter: 2.14cm/0.8 (Approx.)Size: US 13, Circumference: 6.9cm/2.7, Diameter: 2.2cm/0.9(Approx.)Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x NFC Ring