5.5" cheek, 5" mouthpiece. Nice transition bit when moving from the ring snaffle to a curb bit. Limited gag action is softer than moving from the ring snaffle directly into a curb bit with swivel or solid cheeks. The 3-piece mouth results in soft and even pressure across the tongue, bars, and lips. Sweet and sour combination mouth increases salivation to lead to a more relaxed jaw and supple mouth.