The quarto, a book format created by folding a sheet of paper twice to produce eight pages, has traditionally been linked to a size similar to the A4 format. This form, common in early printing, was employed for both academic and literary works, as evidenced by Gutenberg’s initial quartos and Shakespeare’s plays, which were frequently published in quarto editions.
Writers such as E. Gordon Duff examined its technical features in bookbinding, while others, like Elsie De Wolfe, emphasized its visual charm in illustrated editions. The quarto’s adaptability—spanning from incunabula to 19th-century publications—demonstrates its lasting influence on the physical and cultural aspects of written materials.