Cock Ring as a ULI?

I want to buy an adjustable cock ring to use as a ULI tool. Of course, what I want to really do is blow this piece of wood up and give it to my wife.

Any suggestions for a cock ring for this purpose? I’ve had no luck with the narrow rings. I think I need something a little wider.

For the record, I’ve done the search on here. Dang, just too much information and none of it really addresses what I am looking for. Any suggestions would be appreciated.

Cable clamps work well.Or you might try a lasso but they tend to slip