These are defined as horses that stand less than 14.2 hands at the withers
These smaller animals were domesticated and bred for various purposes 
all ... horse that measures less than 14.2 hands (58 inches, 147 cm) at the withers
,... [DOC] [TLE] The Difference Between a Pony and a Horse - Today I Found Out [PAR] Jun 21, 2013 ...