What rings go with what pumps

Constructive discussions on Vibrating penis ring:

do penis pumps work?
so me and my boyfriend were talking about toys and then he mentioned that he wanted to try a penis pump. we were both wondering do they actually work...

What color is more alluring for a vibrator?
I am looking into purchasing a vibrator and can not decide on the color. I am trying to fill up my toy chest. So I would like your opinion.

Will this ring have Discoloration?
Will this clear color discolor to yellowish with lube/contact with condoms?

Layering of silicone when you're making your own pleasure toy - do you think you could manage different softness/hardness?
Just wondering, because I found out that one can mix cornstarch with 100% silicone caulk, and that depending on how much cornstarch you add you can...

Glans/ Frenulum rings
Has anyone had personal experience with these (particularly if you or your partner is uncut). If so, the open or closed style? And what were the...

I guess you are talking about the ring of the pump that you slide off after erection? Use a regular cock ring like the Titanmen or maybe even the Penis Pump Erection Enhancer

Even using regular C-rings I have never been able to keep the bigger size for too long.