The world's smallest horse is '''Thumbelina''', a genetic dwarf of a miniature horse<ref>There are different definitions for miniature horse. Either less than 9.2 hh or less than 8.2 hh.</ref> that is just 4.1 hh (17 inches). | The world's smallest horse is '''Thumbelina''', a genetic dwarf of a miniature horse<ref>There are different definitions for miniature horse. Either less than 9.2 hh or less than 8.2 hh.</ref> that is just 4.1 hh (17 inches). |