There is nothing more frustrating for a customer than trying to scan a QR code on a poster or business card, only for their phone camera to repeatedly fail. In almost all cases, scanning failure is caused by printing the QR code too small or placing it too far away. This guide covers qr code size on business card, poster, and menu print sizes — the formulas that prevent scan errors.
What Is the Golden Scan Ratio Formula?
The industry standard rule of thumb for scanning distance is the 10:1 ratio. This means your QR code print size should be 1/10th of the distance from which you expect users to scan it.
For example: if a customer scans a table menu from 30cm away, the QR code should be at least 3cm x 3cm. If you place a QR code on a banner expected to be scanned from 2 meters away, the QR code must be printed at 20cm x 20cm or larger.
What Are the Minimum Print Sizes by QR Type?
- URL QR Codes: 2cm x 2cm. Keep URLs short to prevent the grid from becoming overly complex.
- WiFi QR Codes: 2.5cm x 2.5cm. SSID and security fields add to the pixel complexity.
- vCard QR Codes: 3.5cm x 3.5cm. Contact cards store significant data, resulting in highly dense patterns that require larger sizes to resolve.