How did the seven-foot man get it?

The ruler of Shang Dynasty was 15.8 cm, so a seven-foot man in Shang Dynasty was only 1 10.6 cm, which was equivalent to a dwarf. If you still say that you are a seven-foot man in Shang Dynasty, it will be a joke. Of course, there was no such thing as a seven-foot man in Shang Dynasty.

From the Warring States to the Qin and Han Dynasties, the length of one foot became 23. 1 cm, and the length of seven feet was 16 1.7 cm, which was actually not high.

From the Three Kingdoms to the Western Jin Dynasty, the ruler increased slightly, reaching 24.2 cm, and the seven feet were 169.4 cm. Now it is of medium height.

In the Romance of the Three Kingdoms, when a person is described as very tall, he is usually described as eight feet tall or even nine feet tall, which seems more realistic. Anything over eight feet (193.6 cm) is really high.

During the Eastern Jin Dynasty and the Southern and Northern Dynasties, one foot increased slightly to 24.5 cm, and seven feet was equivalent to 17 1.5 cm. In the Northern Dynasties, it reached 29.6 cm, and seven feet was 207.2 cm, which was quite high.

There were so-called big feet and small feet in the Tang Dynasty. Big feet 36 cm, small feet 29.6 cm, just like the Northern Dynasties. According to a big ruler, seven feet is 252 centimeters, which is not high enough for most people.

In the Song and Yuan Dynasties, the small scale was increased on the basis of the Tang Dynasty, reaching 3 1.2 cm, and the seven-foot scale was 2 18.4 cm.

Rulers continued to grow in Ming and Qing dynasties, reaching 34. 1 cm and 35.5 cm respectively. The modern seven-foot length is 238.7 cm and 248.5 cm.

To sum up, the seven-footed people in Wei, Jin, Southern and Northern Dynasties were about the same height as people today, and they can't be described like this after the Southern and Northern Dynasties. A seven-foot man is basically equivalent to gigantism.