Cal Exotics' First Time Fetish...a high quality collection of playful fetish gear designed for first time or experienced users. The O Ring Gag has a comfortable, adjustable cinch design that fits up to 32"/81.25 cm. Includes 3 interchangeable rings for a comfortable fit. 85% PVC/15% Polyester (straps) Rubber (rings) Nickel-Free Iron (rivets, snaps). 1.25/3.25 cm (small). 1.5/3.75 cm (medium). 1.75/4.5 cm (large).