True: Tinker Toy was the world's smallest cat at only 7cm tall.

According to Guinness World Records, the world's smallest cat was Tinker Toy, who measured 7cm in height and died in 1997.According to Guinness World Records, the world’s smallest cat was a male blue point Himalayan-Persian named Tinker Toy. He was only 7cm (2.75 in) tall and 19cm (7.5 in) long when fully grown and was owned by Katrina and Scott Forbes of Taylorville, Illinois, U.S. Tinker Toy was born on 25 December 1990 and died in November 1997 at the age of six.