Chastity and orgasm denial discussion

Hello everyone, I have never worn a chastity device before, but am looking into getting one because a Domme I had served, moved and asked me to get one. What I am looking for is something cheap, but that would fit Ok. This would just be a trial, to wear one and feel how it is to be restricted, etc. Then I’d get a real one, more expensive one, for long-term, where she would have the key. Anyone have an recommendations on something to try/start with. Maybe something on amazon? Thanks in advance. aiden