3 inch Cheeks, 5 inch Mouth. 7/16 inch Smooth Sweet Iron Snaffle. Training bit that works off a horse's nose by using the rose buds on the rope to contact the nerves. Teaches a horse to headset , flex, turn over his hocks and stop without hurting the bars of his mouth. As you pick up on the reins, light pressure goes to the mouthpiece keeping your horse "light in the mouth" . Great for tuning up a mature horse.