Robert Pershing Wadlow was born in Illinois on February 22, 1918 he was also known as Alton Giant or Giant of Illinois or the tallest man in the history of the human kind. He was 8 feet 11 inches (2m 72cm) tall and weighted around 220 kg. He became famous for his abnormal height caused by an extremely high level of human growth hormone. He died at the age of 22.
2. Don Koehler 8 feet 2 inches (2m 49cm)
3. Zeng Jinlian 8 feet 1.75 inches (2m 48cm)
4. Sultan Kosen 8 feet 1.5 inches (2m 47cm)
5. Zhao Liang 8 feet 1.1 inches (2m 47cm)
Zhao Liang was born in 1982 and grew to a height of 8 feet 1.1 inches (2m 47cm). He is a circus performer in China.