How big was the calligraphy paper before the Tang Dynasty?

According to Hu's "Dong Qing Lu Ji", the northern paper in the Jin Dynasty was horizontal curtain paper, so the paper grain was horizontal and flat, and the texture was loose and thick, which was called side paper. Nanzhi uses vertical curtains, so the lines are vertical. The original works of the two kings mostly use the vertical bamboo paper of Huiji. The height of the paper is about one foot and the length is about one and a half feet. According to Su Yijian's Four Books of the Study in the Northern Song Dynasty, Jinling's works are as follows: the big paper is one foot three points long and one foot eight points wide. This piece of paper is nine inches five minutes wide and one foot four inches long. The gold ruler is about one foot 25.8 cm. After conversion, the large paper in Jin Dynasty is about 365,438+0.3, 43.4 cm long, and the small paper is 22.9 cm wide and 33.7 cm long, which is modeled after the standards of Tang Dynasty and Jin Dynasty.