Perfect for daily wear Size: 0.19 inches/ 5.00mm (approx. size as single cut stones are hand carved; each stone would have slight variance). Thickness of pipe: 20 gauge Handcrafted in 92.5% Sterling Silver with screw at back to lock the nose pin. Owing to its small size & craftsmanship 925 Hallmarking is not always possible, as the process requires an application of strong on the metal.