Weaver Leather Miracle Collar(R) Patented by an equine dentist, this collar effectively and humanely prevents cribbing. Can be worn comfortably and safely when eating or drinking, with or without a halter, and applies pressure to the larynx only when the horse begins to crib. Unique shape keeps collar in place. Made in U. S. A. Item Specifications: Sizing: Small - Small Pony, Weanling, Yearling (200- 600 lbs) Medium - Large Pony, Cob, Arabian, Average Horse (600- 1, 100 lbs) Large- Warmblood, Draft (1, 100- 1, 800 lbs)