The term "octavo" has been widely used in literature to denote a specific format and size of printed material, often serving as an indicator of a book’s physical characteristics and sometimes even its brevity. For instance, early editions and collected works were explicitly identified with the term, as seen in the first octavo edition of Edmund Burke’s works [1] and in the description of Memoirs published in octavo volumes [2]. It also appears as a measure of length, such as the Upanishad's four octavo pages [3] or Jane Austen’s remark on a man condensing his thoughts into an octavo [4]. Additionally, octavo is employed to contrast typesetting formats—Walter Scott notes a shift from quarto to octavo in subsequent editions [5]—and to detail physical book attributes like the number of sheets or pages [6, 7, 8], or even the specifics of a fly-leaf inscription [9]. This versatile usage underscores its role as a technical descriptor in the history and production of literature.