Ines I understand the roots of the question. The why is always interesting however, especially if a girl that age is asking.
@Eva My best guess is she wants more than just a belt, being honest based on your description. But some of those discussions lie outside of the topic here.
The basic, chastity only answer to your question is you can buy her a belt of course, but that requires a lot of responsibility that comes with.
Ines I think the key is in age, obviously if is a little girl she is not in age for wear it, and what is exactly what she wants/expects.
Exactly. There is nothing wrong per se with giving her what she wants, but the non-chastity parts I expect she wants are outside of scope here. There's a lot of depth here to her requests, @Eva.