1/4" Stiff 4 knot halters are used by many famous trainers world wide. Made in the USA using premium stiff polyester halter cord (also made in the USA) Manufactured by the Knotty Girlz in Washington State.Our yearling size will fit standard yearling horses and ponies. Standard halters will fit the majority of standard sized horses. Large horse will fit the larger horses as well as draft cross. Looking for other sizes? Please visit our website.