1, the most common spine or album is the front cover, the spine in the middle and the back cover below.

2. If we use PS to create a size, we must first change the unit to print millimeters or centimeters.

3. If our book needs 17cm*2 1cm, that is, the size of a page, then we need to design the size of the whole text when creating, and the front cover and back cover are 17cm, and then the spine in the middle should be calculated according to the thickness of the book.