Does the subject want to ask "How long, how long and how wide is the 4-foot rice paper in the 4-volume mounting tutorial video"? The longitudinal dimension is: width 34.5cm；; The length is 138cm, and the transverse dimension is 69cm；; 69 centimeters wide. In the manufacture of calligraphy and painting and rice paper, 4-foot rice paper is divided into vertical opening and horizontal opening, and the length and width of the two opening methods are different. The vertical opening size is: 34.5cm wide; The length is 138cm, and the transverse dimension is 69cm；; The width is 69cm, which is consistent with the video of the 4-volume tutorial. Xuan paper, a specialty of Jingxian County, Xuancheng City, Anhui Province, is a national geographical indication product.