This ring is size 57 with European standard and is made of gold and has no technical problems, the top of the model is made of lathe plates, which has a shiny and beautiful appearance after production. The weight of the ring with different materials is as follows:18k Yellow Gold: 4.27g18K white gold: 4.06 gramsSilver: 2.87 gramsRose Gold Gold: 4.27 gramsPlatinum: 5.57 gramsTitanium: 1.25gSteel: 2.13g I would appreciate it, if you have any comments or suggestions, leave me a comment, I am ready to cooperate.