Fetish Fantasy Beginners Open Mouth GagFetish Fantasy Series. Beginners Open Mouth Gag lack Open wide and say ahhh! with the Beginner's Open Mouth Gag! This sexy o ring gag is made for first timers and features a 1. 75 inches inside diameter. With the sturdy ring gag held securely between their jaw, your subject will not be able to say a word, while their mouth is propped wide open and easily accessible! The metal ring gag is wrapped in vinyl and secured in place with an adjustable vinyl