TOUS MANIFESTO signet ring with 18kt gold plating over silver and onyx and motif at the center. Size of the gemstones: 2 mm. Size of charms: 9.8 mm. Motif thickness: 3.6 mm. Ring thickness: 1.7 mm. It is made of sterling silver with 18 to 23kt gold plating and has a thickness of 3 microns. This quality guarantees a greater durability of the jewel.