Retro Inspired Stainless Steel Ring with Black Onyx Stone This Ring has a Retro Inspired Design with a Raised Black Onyx Stone It's Manufactured with Stainless Steel in High Quality 316L Surgical Steel (Non Allergic) Ring Dimensions:&lt;br&gt;9,10,11,12,13,14 (American Scale) x Width: Variable from 3/16" (5 mm) to 5/8" (16 mm)