how big is a mass market paperback book
Paperback A mass-market paperback is a small, usually non-illustrated, inexpensive bookbinding format. This includes the U.K. A-format books of 110 mm × 178 mm (4.3 in × 7.0 in)[2] and the U.S. "pocketbook" format books of a similar size. These are generally printed on low quality paper, which discolors and disintegrates over a period of decades.[citation needed] They are commonly released after the hardback edition and often sold in non-traditional bookselling locations such as airports, drugstores, and supermarkets, as well as in traditional bookstores.