Question: what is the difference between full quarter horse bars and semi?
Answer: Semi-Quarter horse bars usually have a 6 1/4" gullet, and Quarter Horse Bars usually have a 6 1/2" to 6 3/4" gullet. ... Full-Quarter horse bars usually have a 7" gullet. They are designed for mutton-withered horses with broader backs. Arab saddles, usually with 6 1/2" to 6 3/4" gullets, are for Arabians.