The spine width is a measure of the breadth of a spine in a book; this is the binding edge of an open book to which pages are attached. It follows that the thickness of the spine also depends on its width.
The spine width can serve many purposes. The spine width is also helpful in assessing the general size of a book for storage on shelves. Another benefit involves estimating page counts in an eBook: this will lead to a thicker spine, which is likely to contain more, so we can get an estimate. Lastly, spine width may be used as a marketing tool. For example, books with thicker spines may look more substantial and expensive.
The width of a book’s spine is essential to its aesthetic and utility. Wider spines are bulkier, and one can see fewer pages through when closed. However, thin ones feel lighter and more delicate.
Even the width of a book’s spine impacts its binding – wider spines call for stronger bindings to keep all pages together. However, slimmer ones may only require less stringent measures. Moreover, this also affects how a flatly open book lies. Often, wider spines cause the book to close itself after it opens!
Publishers ought to consider all these factors, including the width of the spine, that influence the book’s appearance, feel, and functionality.