QR Code Size Guide: Plan and Test Your Print
Published: 2026-08-31 · Updated: 2026-09-30
“How big should this QR code be?” has one honest answer: it depends on how far away the phone will be. Print it too small and people give up; print it huge and you waste layout space. There is no size that guarantees every phone, printer and material will work. Use the examples below to plan, then test the final proof in its real environment.
Use distance as a planning estimate
Size ≈ scanning distance ÷ 10 is a useful starting estimate, not a QR specification or a promise of recognition. Lighting, camera focus, data density, print process and surface all change the result. Leave room to increase the code for curved, glossy or outdoor placements, and prove the design before printing a batch.
Starting points by placement
These are this site’s planning examples, not measured scan-distance results or official minimum sizes. Test the actual symbol and print.
| Placement | Typical distance | Starting size to test |
|---|---|---|
| Business card | 15–20 cm | 2 cm (3 cm for a full vCard) |
| Flyer, menu, table tent | 20–30 cm | 2–3 cm |
| Product packaging | 20–30 cm | 2–3 cm, flat area only |
| Poster on a wall | 1 m | 10 cm |
| Shop window, banner | 2 m | 20 cm |
| Signage, trade-show booth | 3–5 m | 30–50 cm |
| Screen, slide, video | varies | Choose size and display time by testing the actual screen |
Data and error correction change the symbol
The table assumes a short URL. What actually matters is the module size — the width of one black square — after the encoder has chosen a version for your data. More data and higher error correction can produce a denser symbol, so do not reuse a short-link layout for a detailed contact card without testing it.
So: fewer bytes generally mean fewer modules and more room for each module. If you are tight on space, shorten the URL before you shrink the code. Compare the generator's minimal vCard example with its detailed vCard example. The mechanics are covered in how QR codes work, and the trade-off for contact cards in the vCard guide.
Resolution: getting the physical size right on paper
At 300 pixels per inch, a 3 cm image occupies about 354 source pixels. This is placement arithmetic, not a QR minimum. Check the actual module size, printer and material. Enlarging a small PNG may soften edges. SVG avoids fixed raster resolution, but the final print still needs a physical proof; there is no universal 1,024 px or 8 cm cutoff. See PNG vs SVG and printing QR codes for the full print workflow.
Do not forget the quiet zone
The four-module blank margin is part of the code, not padding you can trim. DENSO WAVE's QR guidance describes this clear area around all four sides. Calculate the final layout from the actual symbol plus its quiet zone; do not crop a generated image to meet a box size.
Sizing checklist
- Measure the real distance from where a person will stand to the code.
- Use the distance estimate as a starting point and leave extra room for outdoor or curved surfaces.
- Shorten the encoded data, then pick the error correction level.
- Reserve layout space for the quiet zone on all four sides.
- Proof at final size, on final material, and scan from the real distance.
If a proof fails, work through the ten causes of a code that will not scan before changing the design — then adjust the size and test again.