The Strict Leather Ring Gag is a simple gag, consisting of a metal O-Ring, wrapped in thin leather, and a cinch strap which pulls the ring tightly into the mouth keeping it open. The straps can be adjusted to any tightness desired, and are secured by looping them through two D-rings. Offered in 3 sizes, yet we recommend the medium for most people. Measurements are inside diameter of gag.