My girlfriend found these, as we’ve not been able to find a condom that would stay on - these are great, very comfortable and much smaller than a standard size. I think these would be perfect for guys in the 4-5 inch range with below average girth. For me, these were still a bit large. We’ve put an order in for the Ceylor Hotshot, which is the tightest condom available (will review those as well once I’ve tried them).
But for anyone that’s a bit below avg in size, I would highly recommend the iron grip.