Hanka "Curious killed the cat!" You are young and I think you should wait some years, before you ask for a belt. You probably think it's exciting to using a chastity belt, but everyday life is not at all easy with a belt. Read posts and you see that nearly all girls here want to get out from it.
Real metal chastity belts are also expensive, and I think you have to change belt at least one or two times, when you growing up. An adjustable Chinese metal chastity belts will not be able to wear 24/7. They are more for sessions some hours, or over a weekend.