Minimum size
For close-range print, start around 2 x 2 cm. Smaller codes can work, but scanning becomes less reliable with long URLs, low contrast, or poor print quality.
Distance rule
The farther someone stands from the code, the larger it should be. Posters, signs, and storefront displays need much larger QR codes than business cards.
Quiet zone
Leave clear space around the QR code. Crowded borders, text, and artwork near the edge can reduce scan reliability.
Print testing
Print one sample at final size and scan it under normal lighting before printing a full batch.
Recommended tool
Use the Branded QR Code Generator to create the QR code described in this guide.