Quick answer
QR size depends on how far away people scan, how much data the code contains, print quality, contrast, and the phone camera. Use the table below as a starting point, then test the final printed artwork at the real scan distance before a full run.
Recommended Sizes by Material
| Material | Suggested QR size | Typical scan distance |
|---|---|---|
| Business card | 2–2.5 cm | 5–15 cm (up close) |
| Product label / packaging | 2–3 cm | 10–30 cm |
| Flyer / brochure | 3–4 cm | 20–40 cm |
| Table tent (restaurant) | 4–5 cm | 30–60 cm |
| Poster (A3/A2) | 6–10 cm | 0.5–1.5 m |
| Banner / storefront signage | 15 cm+ | 2 m or more |
These are practical starting points, not fixed rules — always test a printed proof before a full print run.
What Actually Determines the Right Size
Scan distance
Longer scan distances generally require a larger printed code. Treat the size table as a starting point, then test the final artwork at the actual distance, lighting, paper, and phone conditions your customers will use.
Data length
A short URL needs fewer modules than a long WiFi password or a full vCard contact record. More data means more, smaller modules at any given print size, so data-heavy QR codes need to be printed larger than the table above suggests for a given material.
Printer resolution (DPI)
Low-DPI printing (like some inkjet or thermal printers) can blur fine module edges. If your printer is under 300 DPI, size the QR code up from the minimums here, or use a vector SVG file so the print driver renders sharp edges at whatever resolution the printer supports.
Contrast
Dark modules on a light background give the most reliable scans. Low-contrast color combinations — light gray on white, or a busy background behind the code — can cause a scan to fail even at an otherwise adequate size.
Frequently Asked Questions
What's the absolute smallest a QR code can be printed?
There is no single safe minimum for every QR code because module count, print quality, contrast, camera, and scan distance all matter. For a small printed business card, start conservatively and test the final print on several phones before reducing the size further.
Does a bigger QR code always scan more reliably?
Up to a point, yes — but a QR code that's too large relative to how close the phone can get can also cause focus issues (the camera may struggle to fit the whole code in frame at very close range). Match the size to the realistic scan distance, not just 'bigger is safer.'
Should I use PNG or SVG for a poster-sized QR code?
SVG (vector) — it stays perfectly sharp at any size because it's defined mathematically rather than as a fixed pixel grid. A PNG scaled up to poster size can blur or pixelate at the module edges.
Download a Print-Ready QR Code
Generate a QR code and download it as a true vector SVG for crisp printing at any size.