The Teeny Tiny Ponies were first introduced in Year 9 of the My Little Pony line. They were smaller than the baby ponies that had become so popular and even tinier than the Newborn Ponies. Their legs were short and stubby and they had chubby faces and bodies.
A second set of Teeny Tiny Ponies called Teeny Pony Twins was released in Year 10. This set featured twins with matching symbols, body, and hair colors. The only way to tell them apart was by their different poses and a small symbol on their cheek, face, or leg.