Why do booklets have to be in multiples of 4s?

Booklets must be printed in multiples of 4 pages because of the way paper is physically folded and bound in commercial printing.

When we produce a booklet, we typically print multiple pages on a single large sheet of paper. That sheet is then folded in half (and sometimes folded again) to create a small “signature.” Each fold creates four page panels: two on the front and two on the back. For example, one folded sheet creates pages 1, 2, 3, and 4. If another sheet is nested inside, it adds pages 5, 6, 7, and 8. This pattern continues in groups of four.

Because each physical sheet equals four finished pages, the total page count must be divisible by four (4, 8, 12, 16, 20, etc.). If a design has 10 pages, the printer cannot physically bind just 10 pages using standard saddle-stitch or folded booklet methods. Two extra pages would be required to complete the folded sheet, bringing the total to 12. Those additional pages are often left blank or used for notes, advertisements, or additional content.

This requirement is not arbitrary; it is based on printing mechanics, paper folding geometry, and binding efficiency. Designing in multiples of four ensures proper alignment, clean binding, lower production costs, and a professional finished product.

If you have any further questions or queries about this subject please contact us and we would be happy to help and advise.