Mini ponies usually get to be no larger than 3 feet 2 inches. Estimating the size of a pony when it grows up according to its present size and age is possible.
To find out how tall a pony will be when it grows up, a present age and size chart as given by Sun Valley Miniature Horses can be used. Another way is to determine the length of its canon bone, which is from its hoof top to knee center. Multiply the length by four, and then add two.
A smaller version of a horse, a mini pony normally weighs from 100 to 200 lbs. and can live for 20 to 30 years.