QR Code Size Guide: How Big Should Your QR Code Be?
QR code minimum size depends on scan distance and pixel density. Learn the recommended sizes for print, screens, and packaging to ensure reliable scanning.
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Tags: qr-code, design, developer-tools
QR Code Size Guide: How Big Should Your QR Code Be? The most common reason a QR code fails in the field isn't encoding errors or bad data — it's size. The code was printed too small, and the camera can't resolve the individual modules clearly enough to decode them. There's a direct relationship between physical size, scanning distance, and module density (which is determined by how much data you're encoding and which error correction level you chose). This guide gives you the numbers you need to size your QR code correctly for every use case. Minimum Module Size The theoretical minimum module size for reliable scanning is approximately 0.25 mm. Most QR experts recommend 0.33 mm as a practical minimum for print. At 300 DPI (standard print quality): 0.25 mm ≈ 3 pixels per module 0.33 mm ≈ 4…
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