* Height: The American Miniature Horse Association (AMHA) defines miniature horses as 34 inches or less at the highest point of the withers (the area between the horse's shoulder blades).
* Weight: They typically weigh between 150-300 pounds, depending on their size and breed.
For comparison:
* Standard horse: A standard horse can be anywhere from 14 to 17 hands high (56 to 68 inches).
* Pony: Ponies are typically between 8 and 14.2 hands high (32 to 57 inches).
So, miniature horses are significantly smaller than ponies, and much smaller than standard horses.