°(paper) A size of paper (7.5"-10" x 10"-12.5")(190-254 x 254-312 mm). Formed by folding and cutting a standard large sheet of paper (15"-20" x 20"-25")(381-508 x 508-635 mm) twice to form 4 leaves (eight sides).
°A book size, corresponding to the paper size.
synonyms:
4to, 4°, q