TERNENCE Chastity Locked 304... https://www.amazon.com/dp/B08NWPVD5Q?ref=ppx_pop_mob_ap_share This is the one I have get the largest ring and a band/strap as well search “chastity cage strap” Use Vaseline and/or heavy moisturizer like Nivea cream or aquaphor
I only discovered my interest and desire for this kink several years after my wife and I married. She was totally turned off from it when I tried pressuring her into it, which was my fault. Years past and eventually this book was written that helped us connect with experimenting with it more:
Chastity: A Guide for Vanilla Wives https://www.amazon.com/dp/B094D1CQKN/ref=cm_sw_r_apan_FJY03PYRB1NRMQF5B2GX
In all seriousness though, I never thought in a million years I would love this kind of kink but here we are. The biggest mistake most men make is pressuring their SOs or having unrealistic expectations. This is something that takes time to get into for some couples, whereas others hit off real quick.
I would recommend reading this book with your SO:
Chastity: A Guide for Vanilla Wives https://www.amazon.com/dp/B094D1CQKN/ref=cm_sw_r_apan_FJY03PYRB1NRMQF5B2GX
It was the very thing that kicked off my wife and I experimenting more with it.