Book Spine Calculation

What is the Spine of a Book?

The Spine of a book refers to the outside edge of the book where the pages are gathered and bound.
In addition to providing an anchor point for the pages, the spine provides the hinge action that allows the book’s cover and pages to open and close.

Printing on the Spine

In most cases, the spines of hard cover books and perfect bound books are wide enough to be printed upon. However, the number of pages and the thickness of the pages is what determines the width of a book’s spine.