The size of the cover of a novel depended on the type of novel and the requirements of the publishing company. Some novels may need a larger cover to better display the content of the book, while others may only need a smaller cover. Usually, the cover of a novel should be large enough to accommodate the contents of the book and the cover picture without affecting the feeling of flipping pages when reading. Therefore, a smaller cover might be more suitable for a smaller novel, while a larger cover might be needed for a larger novel. The size of the cover of a novel should be determined according to the type of novel and the requirements of the bookstore. If you want to buy a cover for a novel, it is recommended to check the publication information of the book to understand the size and requirements of the cover.