I've never been one for micro cages as they seem more for short-term fun/novelty than for any substantial period of denial, at least to me. My wife bought me one recently, though, not because of the tiny size (per se), but because it's molded to look like a pussy and she thought it would be fun for some humiliation play. I wasn't even sure if I'd get it on — I'm a grower, not a shower, but still never tiny — but I must say that it wasn't too hard to get locked, and she was right...it definitely makes me look/feel tiny and humiliated (even though sissy play isn't my thing, but that makes it even more humiliating). I still don't think it'll become part of our longer-term chastity games, but will be fun to come up with ways she can use it to degrade and debase me. Hoping she makes me put it on and show it to some of her friends so they can laugh at me and perhaps suggest she go fuck someone with a real dick (we've talked about cuckolding but haven't crossed the line yet). Anyway, I recommend the cage for anyone thinking about it.
Not sure where she got it, but they have it here: https://oxy-shop.com/products/vagina-shape-tiny-chastity-cage
It looks great! If your wife likes it that’s all that matters. I was thinking of buying something similar. My wife is interested in having a girl on girl experience. Im thinking if I have this cage on and leaking it might feel like she’s going down on another woman.