1. Quick Reference
| Format | Typical scan distance | Recommended code size |
|---|---|---|
| Handheld flyer (A5) | 30 to 40 cm | 3 to 4 cm |
| A4 flyer or notice | 40 to 60 cm | 4 to 5 cm |
| A3 poster at a wall | 1 to 1.5 m | 10 to 15 cm |
| Large wall display | 2 to 3 m | 20 to 30 cm |
Use our [QR size calculator](/qr-size-calculator) for precise sizing based on your specific viewing distance and payload.
2. Placement
Place the code in the lower third so people can hold a phone comfortably, and never at the extreme corner where trimming can cut the quiet zone. Follow our [QR placement guide](/qr-placement-guide) for optimal positioning on various poster formats.
3. Add Context
Include a short call to action and a fallback URL created with our [UTM builder](/utm-builder) for tracking. Use matte paper to avoid glare from overhead lights. Generate high-quality codes with our [URL QR code generator](/url-qr-code-generator). Test print quality with our [printed QR tester](/printed-qr-tester) before bulk printing. Use our [error correction simulator](/error-correction-simulator) to select appropriate error correction for your printing method.
Putting this into practice
Start with the smallest real test you can run. Generate the code, print it at the exact size you plan to use, and scan it with two different phones in the lighting where it will live. Check that the destination page loads quickly on a mobile connection and that the call to action next to the code tells people what they will get. If anything feels slow or unclear, fix it before you print a full batch, because reprints cost more than a short test. Keep a note of the size, material, and placement that worked so the next batch starts from a proven setup.
Common mistakes to avoid
The most common mistakes are easy to avoid once you know them. Long payloads make modules tiny, low contrast makes edges hard to read, and text placed too close to the border eats the quiet zone the scanner needs. Covering a corner finder pattern with a logo or a sticker breaks detection entirely, and a code placed behind glare or on a curved surface fails even when the print is perfect. Review each of these points on a proof copy, and treat any failure as a reason to adjust the design rather than a reason to blame the scanner.
Quick checklist
- Keep the payload as short as practical so modules stay large.
- Keep dark modules on a light background with strong contrast.
- Leave a clear quiet zone on all four sides of the symbol.
- Test the printed code at the real viewing distance and lighting.
- Confirm the destination page loads fast on a phone.
- Recheck the code after any change to the link, design, or placement.
