The digest size strikes a balance between portability and readability. It’s common for literary fiction, poetry, and personal essays, giving a more refined look than mass market paperbacks while remaining compact.

Best for: Literary fiction, poetry collections, personal essays, and memoirs.

This is the most popular trade paperback size in the USA and Australia. It’s widely used for both fiction and nonfiction, offering an ideal page count-to-cost ratio with a comfortable reading experience. Perfect for novels, memoirs, and general nonfiction titles.

‍Best for: Novels, memoirs, narrative nonfiction, and general trade publishing.

This larger trade size is commonly used for nonfiction, business, self-help, and academic books. The slightly roomier page allows for more readable layouts, charts, and subheadings. It conveys a premium, authoritative feel, making it a favorite for professional and educational works.

Best for: Business, self-help, educational, and professional nonfiction titles.

The Royal size is the standard for international trade paperbacks, particularly in the U.K. and Europe. It’s favored by traditional publishers for literary fiction, biographies, and academic books.

‍Best for: Literary fiction, biographies, academic works, and global trade editions.

The international standard paper size used throughout Europe, Asia, and Australia. A4 books are ideal when precision matters — such as in manuals, reports, and technical documents — and when alignment with standard office printing is desired.

‍Best for: Reports, business publications, design portfolios, and formatted manuscripts.

The standard American paper size and one of the most widely recognized formats for print. Used for workbooks, academic materials, art collections, and photo-heavy nonfiction, this layout offers maximum space for content-rich pages.

‍Best for: Educational books, photography, and business or reference titles.

A compact square format with a unique, modern feel.It’s a creative choice for children’s books, poetry, and art-driven titles, where balance and whitespace matter as much as the text itself.

‍Best for: Children's books, Illustrated stories, gift books, and artistic projects.

The most popular square format in print-on-demand publishing, offering a perfect blend of visual appeal and affordability. It’s the go-to size for children’s picture books, cookbooks, and art books with rich color and images.

‍Best for: Children's books, visual storytelling, art, photography, and lifestyle titles.

A refined landscape format that’s slightly smaller than standard letter landscape. This orientation is ideal for photo essays, travel books, and design portfolios, where horizontal layouts enhance visual flow.

‍Best for: Photography, design, and illustrated nonfiction.

The landscape equivalent of US Letter, offering generous space for visuals and wide-format layouts. It’s frequently used for presentations, portfolios, cookbooks, and art books, delivering a professional coffee-table style appearance.

‍Best for: Children's books, art, photography, and design books with panoramic images.

The landscape version of A4, common in international markets and favored by designers and educators. It’s ideal for presentations, architecture portfolios, and technical publications that require both space and structure.

‍Best for: Design portfolios, educational visuals, and large-format manuals.