The issue you raise is at the heart of how critical it is to find the exact right size, I'd say. Yeah for me personally, 48mm does it: Very pleasant hold when flaccid; minor arousals through the day have longer consequence; The grip during full erection is severe and yet always extremely pleasant how ever long the sex session; the magic of enhanced girth and solidity right up into the glans is awesome for me and for her; as to ejaculation, for me spurting is indeed reduced and it's more a flow-release and it takes longer, but I am ok with that at my age. A critical factor of having the right size is that post ejaculation a guy remains comfortable; a too tight ring will suddenly after ejaculation become extremely uncomfortable, whereas the right size I find means that I can really enjoy [as can she] a prolonged period of post-ejac heft and sturdiness, in complete comfort.
Just remembering a time and I'd turned 60 when solo, lying on my back, ring on, I still managed to spat one of my nipples so I guess that counts as "spurting"!![]()
Same for me. 48mm is about 1 7/8 inch and the non stretch silicone "O" rings I use are that size. If I want a bit more pressure, I'll use 2 or 3 at once. I also have a heavy steel ring. 2" ID and it is heavy. It works just as well.