Which is the best Book size for my book?

There is no right or wrong size when it comes to book design, however, there are a number of tips or rules which will make the end product more presentable and more affordable. The number of pages in your book is a factor when it comes to the book size. The more pages in a book, the larger the spine of the book needs to be, and this will have an impact on the margin or space between the binding edge and the internal text. The thickness of the stock chosen is also a factor. Thicker paper will increase the spine of the book. Books over 200 pages require a larger margin between the spine and the internal text. Therefore, a larger book size should be considered.

Trade paperbacks which includes fiction novels

Based on 200 internal pages and under a 5 x 8 inches (203 x 127mm) and 5.5 x 8.5 inches (216 x 140mm) is suitable. Over 200 pages a 6 x 9 inches (229 x 152mm) would be better suited.

Non Fiction Novels

Based on 200 internal pages and under a 5 x 8 inches (203 x 127mm) and 5.5 x 8.5 inches (216 x 140mm) is suitable. Over 200 pages a 6 x 9 inches (229 x 152mm) would be better suited. 

Children's books

Book size (Trim size) 8 x 8 inches (203 x 203mm).

Family History, Cook Books, Magazines, Annual Reports and Technical or Training manuals

Book size (Trim size) 8 x 8 inches (203 x 203mm), 8 x 10 inches (254 x 203mm), 8 x 10.88 inches (276 x 203mm), 8.25 x 11 inches (280 x 210mm), 8.268 x 11.693 inches (A4) (297 x 210mm), 8.5 x 8.5 inches (216 x 216mm).