Usually the printed paper is folio, namely 1, 889 * 597 2,787 * 546.
Size: 1, 435 (217.5 after folding)+6 (trimming) *2 17.5+6 (trimming)
That is, 44 1*223 (folio four spelling)
2,380 (folded 190)+6 (trimmed) * 190+6 (trimmed)
That is, 386* 196 (four for one) is used once it is moved here, which is too wasteful.
Summary: Square book size: 217.5 * 217.5; If binding and trimming are considered, it should be designed according to 44 1*223.
Consideration should also be given to enforcement.