She may be standing in the shadows but one little horse is reaching heights of her own. At a mere 17 inches, the miniature brown mare known as Thumbelina takes pride in the lofty title of the World's Smallest Living Horse
World’s Smallest Horse: cm tall. But even for the breed Thumbelina is particularly small: she is thought to be a dwarf-version of the breed. At just 60 lb and tall, the five-year-old Thumbelina is the world’s smallest horse.