Originally Posted by DressageDreamer
Take a smeasuring tape and measure from the middle of the knee to the coronet band. It is pretty darn accurate. You can check it on your mature horses and will see that it is usually very close to their height in hands. So 14 inches would be 14 hands, etc.
That's the closest estimater I've seen. It's always been real close for me. And 1/4" on the measurement = 1" (17 1/2 " = 17.2 hands). I've had it be a fraction of an inch off, but then my measurement might not be exactly on the dead center of the knee, so I usually attribute any small fraction off my estimate to my being a fraction off on my measuring. Easier not to quibble over 1/8" on their final height.
Except when it makes the difference in my foot being able to reach the stirrup