QR Code Size Guide for Print: Minimum Size and Distance

Size depends on one thing above all: how far away the phone will be. The common rule of thumb is a 10:1 ratio between scanning distance and code width. It is not part of the QR standard; it is a practical guide used by printers and designers that works for typical codes holding a short web link.

If you are unsure, err larger. A code that is too big costs some layout space; a code that is too small does not work at all, and you only find out after printing.

For codes that people scan with a phone held close, about 2 × 2 cm (0.8 × 0.8 inch) is the practical floor. Below that, phone cameras struggle to focus close enough to resolve the modules, and small printing errors start to merge neighboring modules together.

The real limit is the size of each module, not the code. A version 3 code (29 × 29 modules) printed 2 cm wide has modules about 0.7 mm across, which phones read reliably at close range. The same 2 cm square holding a 61 × 61 contact card would have modules of just 0.33 mm, which is why dense codes on business cards often fail. If you need a code smaller than 2 cm, put less in it: a short link instead of the full content.

Many people find the module arithmetic easier with a quick check: divide the code width by the number of modules across. Aim for roughly 0.7 mm or more for close-up scanning, and scale that up in proportion to distance for anything read from further away.

A QR code grows by adding modules, not by making them bigger. The standard defines 40 versions: version 1 is 21 × 21 modules, and each version adds 4 modules to the width and height, up to 177 × 177 for version 40. The generator picks the smallest version that fits your content at the chosen error correction level.

Printed at the same width, the 61-module contact card has modules less than half the size of the 29-module short link. To keep the same module size, it needs to be about twice as wide. This is one of the practical reasons people use dynamic codes: a short link keeps the code simple no matter how long the destination URL is.

Error correction also adds modules. Level H, which tolerates the most damage, needs more modules than level M for the same content: the 37-character link above becomes version 5 (37 × 37) at level H.

The quiet zone is the blank margin around the code. Scanners use it to find where the code starts and stops. ISO/IEC 18004 specifies a quiet zone 4 modules wide on every side, in the same light color as the code’s background.

Worked example: a 29-module code printed 3 cm wide has modules of about 1.03 mm, so the quiet zone is about 4.1 mm on each side and the total footprint is about 3.8 cm. Text, borders, photos and the edge of the page must stay outside that footprint.

• Dark on light. Black or a very dark brand color on white or a very pale background is the safe choice.
• Keep the contrast high. Pale greys, pastels, mid-tone color pairs and red on green tend to fail, especially in dim restaurants and bars.
• Avoid inverted codes (light modules on a dark background) unless you have tested them. The current edition of the standard allows them, and many phone cameras read them, but not every scanner app does.
• Watch the finish. Gloss lamination, foil, metallic inks and clear plastic can reflect light straight into the camera. Matte finishes are easier to scan.
• Mind the material. Kraft paper, fabric and corrugated board lower contrast and can blur module edges. Print larger and test on the actual material.

Logos and artwork are possible, but they rely on error correction to cover what they hide. See error correction levels and how to keep AI QR art scannable.

Use a vector file (SVG, PDF or EPS) whenever your printer accepts one. Vector codes stay perfectly sharp at any size. If you have to use a PNG, make sure it has at least 300 pixels per inch at the final printed size:

• A 3 cm (1.18 inch) code needs at least about 355 pixels across.
• A 1024-pixel PNG prints sharply up to about 8.7 cm (3.4 inches) at 300 ppi.
• Large-format posters viewed from a distance can drop to 150 ppi: a 30 cm code then needs about 1,770 pixels.

When you resize a PNG, scale it in whole-number steps or use nearest-neighbour resampling, so module edges stay crisp instead of blurring into grey. Never stretch a code in one direction; it must stay square.

1. Print a proof at the real size, on the real material if you can.
2. Scan it with at least one iPhone and one Android phone, using the built-in camera app.
3. Scan from the real distance and angle, in the real lighting: a dim dining room, a sunny shop window, a moving queue.
4. Check the page it opens loads quickly on mobile data, not just office WiFi.
5. For a large run, check the first printed sheets before the rest of the job runs.

A dynamic code gives you one more safety net: if the destination turns out to be wrong after printing, you can change where it goes without reprinting. It cannot fix a code that is too small, though, so size it properly first.

CirculateQR exports PNG files at 256, 512 or 1024 pixels, SVG for plain codes, and an A4 PDF with the code in a 120 mm box. For print, use the SVG where you can, and leave the 4-module quiet zone in your layout. AI art codes are generated at 2K by default, with 4K available on the Artisan and Stealth plans. Plain and logo codes use error correction level H, and a dynamic code’s short link keeps them at 37 × 37 modules no matter how long the destination is, so a 2.5 cm code still has modules of about 0.7 mm. Plans and limits are on the pricing page, and the free generators start at /qr-code-generator.