Abstract: An apparatus is provided for measuring the width of the mouth of a horse or other domesticated farm animal so as to allow one to select a bit of suitable width. The apparatus includes a crossbar having first and second ends, a first annular stop received on the crossbar adjacent the first end and a second annular stop received on the crossbar adjacent the second end. At least one of the stops slides along the crossbar. The width of the horse's mouth is measured by engaging a first side of the mouth of the horse with the first stop and a second side of the mouth of the horse with the second stop and measuring the distance therebetween along the crossbar. Central openings in the annular stops receive and accommodate any wrinkled flesh around the margin of the mouth are the apparatus is positioned to complete the measurement of the mouth. This insures accurate width measurement.

Abstract: An apparatus is provided for measuring the width of the mouth of a horse or other domesticated farm animal so as to allow one to select a bit of suitable width. The apparatus includes a crossbar having first and second ends, a first stop received on the crossbar adjacent the first end and a second stop received on the crossbar adjacent the second end. At least one of the stops slides along the crossbar. The width of the horse's mouth is measured by engaging a first side of the mouth of the horse with the first stop and a second side of the mouth of the horse with the second stop and measuring the distance therebetween along the crossbar.