The paper size is 'double folio', with two pages printed on each side (four pages per sheet). After printing the paper was folded once to the size of a single page. Typically, five of these folded sheets (10 leaves, or 20 printed pages) were combined to a single physical section, called a quinternion, that could then be bound into a book. Some sections, however, had as few as four leaves or as many as 12 leaves. Some sections may have been printed in a larger number, especially those printed later in the publishing process, and sold unbound. The pages were not numbered. The technique was not new, since it had been used to make blank "white-paper" books to be written afterwards. What was new was determining "beforehand" the correct placement and orientation of each page on the five sheets to result in the correct sequence when bound. The technique for locating the printed area correctly on each page was also new.