This tool wraps around the horse's girth to give an approximate weight. It is great for working out dosages for wormers, and includes markings in hands to measure the horse's height.
My sister works for the manufacturer, and she purchased some for me on my birthday in 2020. They are sturdy, flexible and made of some strong stuff. Used to buy Kmart tubs that would only last a few months. I plan on buying more, if I ever need new ones in the future.