Stretch-Liquid Silicone Ring
The "Stretch-Liquid" is super-elastic and easy to open, put on, and remove whenever you want. It doesn't squeeze as much as the "Stretch-Hard", but that's why the inner diameters are narrower to achieve the same effect.
In this case, the inner diameter is 35mm, the thickness of the ring is 10/17mm, and the outer diameter is 55mm. Attractive, masculine, comfortable for every man.
Remember to always use a water-based lubricant with silicone toys, as silicone lubricants weaken the toy over time.