” With that in mind, I’ve tried to put together the definitive post on word count for fiction (novels, young adult, middle grade, children’s books and even memoir).
Choose a trim size You’ll need to choose a trim size for your book just as a starting point, so choose the one below that’s the most appropriate for your book: For fiction: 5.5″ x 8.5″ For nonfiction: 6″ x 9″ Large format books with illustrations are more difficult to predict the final page count, but usually large pages will have a similar amount of text as small pages, as part of the large page will be devoted to illustrations, sidebars, captions, and so on.
Choose one of the above sizes, even for your large format book, just as a starting point.
Controlling your page count You may be surprised by your page count, and realize that your book is going to be thinner or thicker than you anticipated.
Moving to even a slightly larger page size can lower your page count and save printing costs.