Korats are a slate blue-grey shorthair domestic cat with a small to medium build and a low percentage of body fat. Their bodies are semi-cobby, and surprisingly heavy for their size. They are intelligent, playful, active cats and form strong bonds with people. Among Korats' distinguishing characteristics are their heart-shaped heads and large green eyes. They are one of a few breeds where individuals have only one color.
The Korat is one of the oldest stable cat breeds. Originating in Thailand, it is named after the Nakhon Ratchasima province (typically called "Korat" by the Thai people). In Thailand it is known as Si-Sawat, meaning "Color of the Sawat Seed". They are known colloquially as the "Good Luck Cat" and are given in pairs to newlyweds or to people who are highly esteemed, for good luck. Until recently, Korats were not sold, but only given as gifts.
However, Korats are no longer seen in Thailand, having long since interbred. Korats now exist due to the diligent efforts of a few breeders, most of whom are outside of Thailand.