But when it comes to rice paper, I can only say that it is about this length.
There are subtle differences between different sizes of paper. For example:
Three-foot rice paper length 100cm, width 55cm, exactly the same. But the four-foot rice paper is 138 long and 69 wide. Does not match.
Six-foot rice paper: length 180 width 97. Does not match.
If you want to buy rice paper or mount calligraphy and painting, you can refer to the specification list of rice paper.
Everyone in the circle speaks according to this list.
There should be a specification list of rice paper in Baidu Encyclopedia.