It's different. All brand rings are different in size and need to be customized. BVLGARI is an Italian luxury brand, which belongs to LVMH Group and was founded by SotirioBulgari in Rome on 1884. 1905, Bulgari Rome boutique ViaCondotti 10 officially opened. 1977, Bulgari's first generation of BVLGARIBVLGARI series watches officially came out. 2002/KLOC-official website shows that Bulgari's products mainly include: jewelry, watches, leather goods, accessories, perfume, theme hotels, etc. Cartier is a French luxury brand, mainly engaged in the manufacture of watches and jewelry, including: jewelry, watches, leather goods, perfume and so on. 1847, Louis-franoiscatier founded Cartier brand in Ruemontogueil 3 1 Paris.