Use this guide to understand the minimum print size of a QR Code.
The minimum size of a QR should be at least be 1.2 inch or 3 cm or 115 pixels (in width and height). To calculate the ideal size of QR Code, follow this advance rule:
The ratio of the scanning distance to the size of the QR Code should be close to 10:1.
To know more about the minimum size of QR Code ideal for your use-case please refer to QR Code Minimum Size: Calculate ideal size for your use case
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