China's paintings and calligraphy are all created on rice paper, and the size of rice paper has a fixed standard. The most commonly used four-foot rice paper is 139 cm long and 69 cm wide, and it is generally about 20 cm more after mounting.
After this size is installed, you can enjoy it at a distance of about 2 meters. You can put all the pictures into your eyes without turning your eyes, and the details of the pictures can also be observed. It is very suitable for family suspension, and the clear height of residential buildings in modern families is about 2.8 meters. Put a table or sofa against the wall and hang a four-foot-high work with a banner on it. The distance between the upper and lower sides is just right, so it won't appear unyielding and too stingy.
If there are pillars at home, you can hang a four-foot vertical work. Generally, there are no tables and chairs under the column, and the width on both sides is just right. After the four-foot rice paper is cut in half along the long side, the size is about 139cm*35cm, which is called four-foot separation. Some Buddhist scholars often use it to write the Prajna Paramita Heart Sutra, and because it is often used to write couplets, it is also called four-foot couplet.
Four-foot rice paper is cut in half along the short side, and two square rice papers of 69cm*69cm are obtained, which are called four-foot square, and are mostly used to create some freehand flower-and-bird and calligraphy works.