Draft Collars and How To Size Them
Below are illustrations of different styles of draft collars, and information on how to size them, from The Work Horse Handbook by Lynn R. Miller.
“It is difficult to accurately measure a horse’s neck without fitting. In other words, there are so many variables involved in the shape and size of a horse’s neck that the only accurate and easy way to size the neck is to use several collars and put them on one at a time until fitting is found. In the heyday of the harness horse, collar makers had sliding shape-conforming measuring devices which were used.