As far as appearance is concerned, the Domestic Cat comes in as many different shapes and sizes as are possible. There are cats as tiny as 4 pounds, and others tipping the scales at a whopping 20. Some are long haired, others have nothing but skin. Fur can be wavy, straight, curly, coarse, thick, thin, and everything else in between. Their bodies are all extremely muscular and nimble, their eyes are designed to see well in the dark, and their paws all have retractable claws, making them an almost perfect predator.