Wu Dalang is less than five feet tall. In Song and Yuan Dynasties, one foot was 3 1.68cm, which means that Wu Dalang was less than 1.50cm, 1.4m or so.

Wu Dalang, the historical prototype is Wu Zhi. According to the calf bone found in 1996, the height of Wu Zhi should be above 1.8 meters, which is definitely not "three-inch fixed bone bark", let alone "short stature".

Wu Dalang, whose real name is Wu Zhi, was born in Wujiana Village, Qinghe County, Shandong Province (now Hebei Province). Although Wu Zhi was born in poverty, he was brilliant and respected martial arts. Middle-aged scholar, became the county magistrate of yanggu county. His wife is the daughter of Zhou Zhijia and lives in Huangjinzhuang, which is 1.5 km away from Wujiana Village.

Extended data:

Dalang, a fictional character in Water Margin, has no prototype and is the oldest martial artist. His name is Wu Dalang, and he is from Qinghe County, Hebei Province. My parents died when I was very young, and I tried to raise my brother Song Wu. Sell sesame cakes and marry Pan Shilian. Shi Naian is a new figure derived from the stories of the walkers Song Wu and Song Wu's fighting tigers described in The Unknown Story of Da Song in Yuan Dynasty and Gong Kai's Praise of Thirty-six People in Sung River in Yuan Dynasty (both literary works are regarded as the prototype or blueprint of Water Margin) (according to Zhejiang Tongzhi, he is a tramp who often entertains in Yongjinmen, and has no brothers).

References:

Baidu Encyclopedia-Wu Dalang