When they're absolutely grown, manatees weigh 800 to 1,200 pounds (360-545 kilograms) and access 10 feet (3 meters) in size. The most significant of the species can improve to be up to 3,500 lbs . (1,590 kilograms) and thirteen ft (4 meters) in length. Their rough skin is wrinkled, and their sizing is no joke: They're about 4 to 4.5 toes (1.2 to 1.4 meters) very long at start and normal 60-70 pounds (27 to 32 kilograms). Friends die.