The minimum QR code size follows the 10:1 rule: scanning distance should not exceed 10 times the code width. For business cards, use at least 0.8 inches (2 cm). For posters viewed from 3-4 feet, use at least 2 inches (5 cm). For banners viewed from 6-8 feet, use at least 4 inches (10 cm). Always print a test and scan from the intended distance before final production.
The 10:1 Rule
A good rule of thumb: the scanning distance should be no more than 10 times the width of the QR code. A 1-inch QR code can be scanned from about 10 inches away.
Size Recommendations by Use Case
Business Cards
Minimum: 0.8 inches (2 cm) Recommended: 1 inch (2.5 cm)
Flyers and Brochures
Minimum: 1 inch (2.5 cm) Recommended: 1.2 inches (3 cm)
Posters (viewing distance 3-4 feet)
Minimum: 2 inches (5 cm) Recommended: 3 inches (7.5 cm)
Banners and Signs (viewing distance 6-8 feet)
Minimum: 4 inches (10 cm) Recommended: 6 inches (15 cm)
Billboards
Calculate based on typical viewing distance. For highway billboards, QR codes are often impractical due to viewing distance and speed.
Factors Affecting Scannability
- Code complexity (more data = denser pattern)
- Printing quality
- Contrast
- Lighting conditions
- Phone camera quality
Testing Your Size
Always print a test and scan from the intended distance before committing to a full print run.
Generate print-ready QR codes in any size with Quality QR.
