QR Code Size for Printing: Minimum Sizes by Use
How big should a printed QR code be? Minimum sizes, quiet zone, contrast and scan distance for cards, posters and packaging.
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The most common reason a printed QR code fails is size. Too small, and a phone cannot focus on it. This guide gives you minimum sizes for common uses, explains the quiet zone and file resolution, and shows how to test before you print a thousand copies.
The 1:10 Distance-to-Width Ratio in Real Life
| Use Case / Placement | Scanning Distance | Minimum Size | Recommended Size | Quiet Zone Margin |
|---|---|---|---|---|
| Visiting Card / Name Badge | 15 – 30 cm | 2.0 × 2.0 cm | 2.5 × 2.5 cm | ≥ 2.5 mm blank edge |
| Table Card / Restaurant Menu | 30 – 40 cm | 3.0 × 3.0 cm | 4.0 × 4.0 cm | ≥ 4.0 mm blank edge |
| Counter UPI Standee (A5/A6) | 50 – 70 cm | 5.0 × 5.0 cm | 6.5 × 6.5 cm | ≥ 6.0 mm blank edge |
| Wall Poster / Shop Door Notice | 1.0 – 1.5 metres | 10 × 10 cm | 15 × 15 cm | ≥ 12 mm blank edge |
| Window Banner / Trade Stall | 2.5 – 3.0 metres | 25 × 25 cm | 35 × 35 cm | ≥ 30 mm blank edge |
Vectors have zero pixelation. A 10 cm or 1-metre banner prints mathematically sharp with lossless curves.
Keep 4 modules of solid white space around the QR pattern. Never let borders, text or photos encroach.
Always test print a single copy and scan under ambient room lighting on both iPhone and an affordable Android.
The one-in-ten rule
A useful rule of thumb is that the code should be about one-tenth as wide as the distance it will be scanned from. If people will scan from 50 cm away, aim for 5 cm. If they scan from 3 metres away, aim for about 30 cm. Dense codes that carry a lot of data need to be larger than this.
Minimum sizes by use
Visiting card, handheld at 15 to 30 cm: 2 to 3 cm wide.
Table card or menu, scanned at about 40 cm: 3 to 4 cm wide.
Counter standee, scanned at 50 to 60 cm: 5 to 6 cm wide.
Poster on a wall, scanned at about 1 metre: 10 cm wide.
Shop banner or hoarding, scanned at about 3 metres: around 30 cm wide.
Large outdoor board, scanned at 10 metres: around 1 metre wide.
Small stickers and labels: do not go below 2 cm, and test first.
These are starting points. Test on the real material, because glare, curved surfaces and low light all make scanning harder.
The quiet zone
Every QR code needs a blank margin around it, called the quiet zone. Keep it at least as wide as four of the small squares (modules) in the code, and do not let text, borders or images enter it. Cropping the margin is a common cause of failed scans.
File resolution for print
Prefer SVG or PDF. They are vector files and stay sharp at any size.
If you must use PNG, aim for 300 pixels per inch at the printed size. A code printed 5 cm wide needs about 590 pixels, one printed 10 cm wide needs about 1,180 pixels, and a 2 cm code needs about 240 pixels.
A 2000-pixel PNG is enough for roughly 17 cm at 300 pixels per inch.
Never stretch a code to a non-square shape or blur it to fit a layout.
Data density and error correction
The more data a code holds, the more squares it has, and the larger it must be printed to stay scannable. Shorten URLs where you can, or use a dynamic code so the pattern encodes a short link. Error correction levels (L, M, Q and H) let a code survive damage, but higher levels also make the pattern denser. Level M or Q suits most prints. Use H when you add a logo or print on surfaces that get scuffed.
Materials and surfaces
Matte paper and matte lamination scan more reliably than glossy.
Avoid placing codes behind glass or on curved bottles and cups without testing.
On fabric and uneven surfaces, print larger and test after washing or stretching.
Keep a plain, solid background behind the code.
Test before you print
Print one copy at the final size on the final material.
Scan it with at least three phones, including an older Android phone.
Scan from the real distance and angle, in the real lighting.
Try with a dirty camera lens and a slight tilt.
Fix anything that fails before the full print run.
Key Takeaways
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