Why these zones exist at all
Printing never happens one piece at a time, but on large sheets that are then stack-cut afterward. And cutting is never one hundred percent exact — there's a tolerance of about half a millimeter in each direction. The three zones of a print file catch exactly this imprecision, so neither a white edge appears nor important content gets cut off.
Zone 1: the trim size
The size of the finished product — 85 × 55 mm for a business card, 210 × 297 mm for A4. This is the line where the actual cut happens. It's the reference point for the other two zones.
Zone 2: the bleed (outward)
The bleed is the area that extends beyond the trim size — usually 1–3 mm all around. Background colors and edge-to-edge images have to run out to here. The reason: if the machine cuts slightly too far out, your background is still there — not the white paper. The most common beginner mistake is pulling the background only to the trim edge — then a white flash appears with the smallest cut shift.
Zone 3: the safety margin (inward)
The counterpart inward: 3–5 mm from the trim edge inward. Nothing important belongs in this margin zone — no text, no logo, no prices. Because if the machine cuts slightly too far in, content placed there would be clipped. Mnemonic:
- Bleed (outer) protects against a white edge.
- Safety margin (inner) protects against clipped content.
The usual values at a glance
| Product | Bleed (all around) | Safety margin |
|---|---|---|
| Business card | 1–2 mm | 3–4 mm |
| Flyer / postcard | 2–3 mm | 3–5 mm |
| Brochure / magazine | 3 mm | 5 mm |
| Poster | 3–5 mm | 5–10 mm |
These are guide values — binding is always the print shop's spec sheet. Applying it to concrete products is in Business card print data and Flyers and posters for the printer.
How to recognize a correct print PDF
A cleanly prepared print PDF has the bleed included and marks the cut edge with crop marks (small corner lines) and a defined "TrimBox". Layout programs (InDesign, Affinity Publisher, many online editors too) generate this automatically when you enable "printer marks" and the bleed setting on export. If you only work with a pixel image, set the canvas correspondingly larger (trim size + bleed all around) and pull the background to the outer edge.
In short
- Trim = finished size (where the cut happens).
- Bleed outward (1–3 mm) prevents a white edge.
- Safety margin inward (3–5 mm) keeps content off the cut.
- Follow the spec sheet; export a PDF with crop marks.