ByStar&reg; Pro Magic Strong Silver Magnetic Ring Magnet Coin Finger Magic Tricks Props Show Ship From Us! Size:inner diameter 20mm(0.79''). For more available sizes, please search:http://www.amazon.com/gp/product/B00WDSMUUA Material: Metal Color: Sliver Package includes: 1* ring, come with gift box. Width:8mm(0.31'')