A person should be 7 feet (2.20 meters) tall or more to be considered a giant. Gigantism is a disorder and the medical reason for gigantism is a surplus of growth hormone.
Robert Wadlow died from an infection in his leg, caused by a badly fitted brace that helped him walk.
A quick walk-through of the life of Robert Wadlow – the tallest man ever.
Robert Wadlow was the tallest man ever at 2.72 meters (8 feet 11.1 inches).