QR Code Size Guide: Minimum Sizes for Every Use Case
Getting the size right is crucial for QR code scannability. Too small and it will not scan. Too large and it wastes space. This guide provides recommended sizes for every common use case.
How QR code size affects scanning
A QR code must be large enough for the camera to resolve individual modules (the small squares). More data encoded means more modules, which means a larger minimum size. The scanning distance also matters — further away requires a bigger code.
Business cards and small prints
For business cards and similar close-range materials, the minimum QR code size is 2 cm x 2 cm (0.8 x 0.8 inches). This works when the person holds the card at normal reading distance (15-30 cm).
Tips
- Keep the encoded data short for smaller, simpler codes
- Use error correction level M for business cards
Flyers and brochures
For flyers, brochures, and table tents (scanning distance 30-60 cm), use QR codes at least 3 cm x 3 cm (1.2 x 1.2 inches). Larger is better if space allows.
Posters and signage
For posters and signs viewed from 1-3 meters, the QR code should be at least 10 cm x 10 cm (4 x 4 inches). Apply the 10:1 rule — the code width should be at least 1/10th of the maximum scanning distance.
Tips
- A 20 cm QR code can be scanned from up to 2 meters away
Billboards and large format
For billboards and large-format displays where people scan from vehicles or across rooms (5+ meters), QR codes need to be 50 cm or larger. Consider whether QR codes are practical at these distances.
Tips
- QR codes on billboards require very simple data (short URLs)
- Test from the actual viewing distance before printing
Digital screens
For QR codes displayed on screens (TVs, monitors, projectors), the same distance rules apply. Ensure the screen resolution is high enough to render individual modules sharply, and avoid auto-brightness that might reduce contrast.
Quick Tips
- Apply the 10:1 rule: code width = 1/10th of scanning distance
- Shorter URLs produce simpler codes that can be printed smaller
- Always include a quiet zone (white border) around the code
- Export as SVG or PDF for print to maintain quality at any size
- Test at the intended print size before ordering large quantities
- Use higher error correction for small sizes or low-quality printing
Frequently Asked Questions
What is the absolute minimum QR code size?
About 1.5 cm x 1.5 cm (0.6 inches) for very simple data scanned at close range. We recommend 2 cm x 2 cm minimum.
Does the amount of data affect the minimum size?
Yes. More data creates a denser pattern that requires a larger print size to remain scannable.
Can I use QR codes on billboards?
Technically yes, but they need to be very large and encode very short URLs. Consider if your audience can practically scan at that distance.
What resolution should I export QR codes at?
For print, use SVG or PDF (vector formats) that scale to any size. For raster images (PNG), export at least 1000x1000 pixels.
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