B Format is a term commonly used within the book publishing industry to refer to a specific paperback book size and style. B Format books typically measure 210x130mm when printed onto A4 paper and have become very popular throughout Europe and Britain, popularly used for mass market paperbacks, trade paperbacks, and children’s titles.
B Format books typically feature two columns per page with small margins and easy-to-read font size, making it a good fit for mass-market paperbacks. B Format books are around 400 pages long, depending on genre and subject matter.
The mass market typically publishes B Format paperbacks, trade paperback publishers, and children’s book publishers. Printed on lower-grade paper than other formats, B Format books usually aren’t found in libraries or academic bookstores but can still be easily found at newsstands, supermarkets, or retail outlets.
Book publishers typically utilize B format as the standard paperback size. B format books usually measure 190mm wide by 130mm height (7.5 in by 5. 1 in), similar to A format but featuring an increased spine width (20mm or 0.79 in). They are commonly mass-market paperbacks such as novel paperbacks.
B format is an international book size standard used across many world regions. Publishing books in this format helps ensure readers receive a consistent look and feel from one book to the next. Furthermore, this format gives authors greater control in book production for increased quality products.