This is probably great for someone wanting to try a Primal Ring first before upgrading their game to a metal ring. Its soft and stretchy so as your cock gets erect it flexes with your body. It is also much friendlier to remove after fooling around than the metal ring. I've not tried the thinner of the two silicone rings and I think the wide one is almost too wide. That said my partner and I enjoy this ring but she and I definitely prefer the metal version.

I like it very much. It’s not my favorite though. It slips a bit with casual wear. I got the smallest size. I think the keyhole doesn’t quite grab and lift the way I’d like. I’m not small in the testicle area but it just doesn’t stay put

Like the other silicone ring, the small size is still too large for all day wear. It’s the smaller size you offer. The metal ring in the same size is a great fit. Can you make a smaller version?

because of the shape, I suspect Primal does make the best rings on the market. However, I used the string to determine sizing and it seemed clear that the 55mm was the right size but I purchased both the 55mm and the 50mm, just in case. Unfortunately I'm not quite as big as I was lead to believe. The 55mm is WAY too big and while the 50mm does provide some additional constriction, it's not as tight as it probably should be. Perhaps the sizing would be a better fit, had I opted for the steel version, but that was why I purchased to 50mm when I measured at 55mm
Though I feel like the sizing guide mislead me and the financial disappointment was costly, I'm potentially considering investing in the 45mm. We'll see.

Amazing ring. Comfortable to wear for extended periods. Does its job to keep me harder when needed. Snug fit and presents the goods like a champ.