QR Code Size Guide — Minimum Size for Print
What size should a QR code be? Minimum sizes for business cards, posters, billboards. DPI and resolution guide for printing QR codes.
Minimum QR Code Sizes by Use Case
For business cards, a QR code should be at least 2cm x 2cm (0.8in x 0.8in). For flyers and brochures, aim for 3-4cm. Posters need at least 5cm, and billboards require 30cm or larger depending on viewing distance. The general rule is: the scanning distance divided by 10 gives you the minimum QR code size. So a code scanned from 1 meter away should be at least 10cm wide.
Resolution and DPI for Print
Always export your QR code as SVG for print — it's vector-based and scales to any size without losing quality. If you must use PNG, export at 300 DPI or higher. A QR code that looks fine on screen at 72 DPI will appear blurry and may not scan when printed. For large format printing (banners, billboards), SVG is essential to maintain crisp edges at any size.
Quiet Zone and Contrast
Every QR code needs a "quiet zone" — white space around the code equal to at least 4 modules (the small squares that make up the code). Without this border, scanners may not detect the code. Use high contrast colors — black on white is safest. Avoid light colors on light backgrounds or dark on dark. If using brand colors, test extensively to ensure scannability.
Frequently Asked Questions
What is the smallest possible QR code size?
The absolute minimum is about 1cm x 1cm (0.4in), but this only works for very simple QR codes scanned up close with good cameras. For reliable real-world scanning, 2cm x 2cm is the practical minimum for business cards and close-range use.
How do I calculate QR code size for a specific distance?
Divide the scanning distance by 10. For a code scanned from 2 meters away, make it at least 20cm wide. For a billboard viewed from 20 meters, the QR code should be at least 2 meters wide.
Does the amount of data affect the minimum size?
Yes, more data means more modules (tiny squares) in the QR code, which requires a larger print size for each module to be readable. A URL QR code needs to be larger than a simple text code. Reduce data or use a URL shortener to keep the code simple.