No more than 4 feet, that is, no more than 4 feet in size. The size of 4-foot rice paper is 4 feet long (about 136 cm) and 2 feet wide (about 68 cm). If it is less than 4 feet, it can be 4 feet whole, 4 feet square (folded in the middle) or 3 feet whole, 3 feet split, or smaller. But it is too small to be exhibited unless it is a group painting. About the paper size, go to the Chinese painting material store to see it more clearly. You must use traditional Chinese painting pigments for coloring, and it is best to use authentic Marley brand, made in Shanghai.
I hope I can help you.