Page numbering in saddle-stitch binding requires the page count to be a multiple of four – that’s a result of how sheets fold into signatures. Perfect binding has no such restriction, since pages are joined individually, so the numbering can end on any number.
This question usually comes up when a client is designing a catalog and wonders why the printer suggests adding or removing a few pages from the original plan.
Why the Binding Type Determines Page Numbering
Saddle-stitch binding, also known as stapled binding, is made by folding large sheets in half and stapling them along the spine. Each folded sheet immediately creates four consecutive pages – two on each side. That’s why the page count has to be divisible by four, or the last sheet won’t fold correctly.
Perfect binding joins individually printed pages along the spine with glue. Each page exists independently of the others, so there’s no technical requirement for the page count to divide evenly.
Page Numbering in Saddle-Stitch Binding, Step by Step
When designing a catalog or brochure for saddle-stitch binding, numbering has to account for how the sheets fold. Typical page count thresholds for this binding type:
- 8, 12, 16, 20, 24 pages – standard variants for brochures and catalogs.
- Above 64 pages – saddle-stitch binding starts losing durability, since the spine gets too thick for staples.
- An incomplete multiple of four – requires adding a blank or promotional page to close out the layout.
If a project comes out to, say, 22 pages, our printer will suggest adding two more – blank, a thank-you note, or extra artwork – so the total closes out at 24.
Page Numbering in Perfect Binding
Perfect binding, used mainly for thicker catalogs and books, doesn’t impose a division into groups of four. Numbering can end on any page, since each sheet is a separate element glued into the spine.
This gives more design freedom, but it has its own technical threshold – too few pages means the spine can’t hold the glue firmly enough. In practice, perfect binding works well from around 40 pages up.
How Numbering Affects Print Order
Pages in a finished publication aren’t printed in the order a reader sees them. The machine prints them in an arrangement called imposition, so that once the sheet is folded and trimmed, the numbering comes out correctly from first page to last.
A numbering error at the file-prep stage almost always comes from overlooking this arrangement – the client numbers pages in reading order, but the file needs to be prepared in print order. That’s why print files go through an extra check before the machine starts running.
Page Numbering and Special Pages
Covers, promotional inserts, or pages on special paper often fall outside the main numbering, or get numbered separately. It depends on whether the page is an integral part of the block or an add-on glued in after folding.
It’s worth settling this at the design stage, since changing the numbering after files are approved requires re-preparing the whole print layout, not just one page.
Summary
Page numbering depends on the binding type. Saddle-stitch binding requires a page count divisible by four, due to how the sheets fold. Perfect binding has no such restriction and works better for thicker publications. Before approving a project, it’s worth confirming with the printer that the page count matches the chosen binding – a simpler way to avoid corrections than fixing the layout after files are prepared.
FAQ
Why does a brochure’s page count need to be divisible by four?
Because each folded sheet in saddle-stitch binding creates four pages at once. An incomplete multiple requires adding a blank or extra page.
Does perfect binding have any page count restrictions?
Yes, though different from saddle-stitch. Too few pages means the spine can’t hold the glue firmly enough – it works well from around 40 pages up.
What happens if my project has 22 pages and I choose saddle-stitch binding?
The printer will suggest adding two pages so the total closes out at 24 – this could be a blank page, a thank-you note, or extra artwork.
Does the cover count toward page numbering?
It depends on the project. Sometimes it’s an integral part of the numbering, sometimes it’s numbered separately – worth confirming before preparing files.