Guide
How Big Should a QR Code Be?
The right size depends entirely on how far away it'll be scanned from. Here's the rule, plus real numbers for common print sizes.
Written by Muhammad Mudassar Saeed · Updated 2026-08-20
There's no single "correct" QR code size. It depends on how far away someone will be standing when they scan it. A code sized correctly for a business card would be unreadably small on a storefront window, and one sized for a billboard would be absurd on a receipt.
The 10:1 rule
A reliable starting point: a QR code's side length should be at least one-tenth of the maximum scanning distance. Scanned from 1 meter away, a code should be at least 10cm per side. Scanned from 5 meters away (a storefront window from the sidewalk), at least 50cm. This is a minimum, not a target; sizing up from there adds margin for error, bad lighting, or an older phone camera.
Sizes by common use case
- Business card (scanned from ~10-15cm): around 2cm / 0.8in per side, minimum.
- Flyer or printed menu (scanned from ~20-30cm): around 3-4cm / 1.2-1.6in per side.
- Poster (scanned from ~1-1.5m): around 10-15cm / 4-6in per side.
- Storefront window or large sign (scanned from several meters): 30cm / 12in or larger.
- Billboard or vehicle wrap (scanned from tens of meters): well over a meter per side; the 10:1 rule scales up fast at distance.
ClearQR's built-in size presets (Business Card at 40mm, Flyer at 80mm, Poster at 150mm) map to these real-world categories, with a Custom option for anything else.
Denser data needs more room
A QR code encoding a long URL or a full vCard has more modules packed into the same physical footprint than one encoding a short phone number, which makes each individual module smaller and harder to resolve at a given size. If you're encoding a lot of data, size up beyond the minimum, or shorten the encoded content where you can.
Frequently asked questions
Does a bigger QR code hold more data?
No. Physical size and data capacity are unrelated. Capacity depends only on how much content you encode, which determines the number of modules automatically. A bigger printed size just makes those same modules easier for a camera to resolve from further away.
Can I resize a downloaded QR code afterward?
Scaling a PNG or JPG up beyond its original resolution will blur it and risks scan failures. Scaling down is generally safe. For resizing to any size without quality loss, export as SVG, PDF, or EPS instead; all three are vector formats.
Is there a maximum size for a QR code?
No practical maximum. QR codes have been printed at building scale. The only real constraint is making sure the quiet zone and module sharpness scale up proportionally with everything else.