These new small diameter domestically made stainless steel rings are perfect to fit right under the head of your shaft. You've probably already got a number of metal cock rings and even metal ball stretchers in your collection. Now you can wear a shaft ring along with your cock ring which will keep your full attention on your cock and balls.

These rings come in 3 sizes: 1-1/4, 1-3/8 and 1-1/2 inches in diameter. You put them on when you're soft... once you are hard, they won't come off until you're soft again. Obviously everybody's cock size varies, but one of these sizes these should fit well behind most of your circumcised cock heads.

You can measure with a fabric tape measure when you are soft, as well as hard, and then divide that by pi (3.14) and see which size should fit under your cock head. Get a couple for multiple placements.