Size. Cheetahs are 3.5 to 4.5 feet (1.1 to 1.4 meters) long from head to rump, and their tails add an additional 25.5 to 31.5 inches (65 to 80 centimeters). Normally, these big cats weigh around 77 to 143 lbs. (35 to 65 kilograms), according to National Geographic.