QR Code Size Guide: How Big Should a QR Code Be?

One of the most common reasons a QR code fails is simply that it was printed too small. Size the code correctly and it scans in an instant from the right distance. This QR code size guide explains how big a QR code should be for business cards, flyers, posters and billboards, and gives you a simple rule you can use anywhere.

Why QR Code Size Matters

A phone camera reads a QR code by resolving each tiny square, called a module. If the code is too small for the distance someone is scanning from, the camera cannot tell the modules apart and the scan fails. Bigger is safer, as long as you keep the design clean.

The 10:1 Distance Rule

The easiest way to size any QR code is the 10 to 1 rule.

Minimum QR Code Size

As a safe floor, keep any printed QR code at least 2 x 2 cm (about 0.8 x 0.8 inches). Below that, many phones struggle even up close, especially if the code holds a lot of data.

Recommended Sizes by Use Case

Other Factors That Affect Scannable Size

Frequently Asked Questions

What is the minimum size for a QR code?

Keep printed QR codes at least 2 x 2 cm. Smaller codes often fail, especially when they store a lot of data.

How big should a QR code be on a poster?

Use the 10 to 1 rule: divide the furthest scanning distance by ten. For a poster scanned from 1 meter, aim for around 10 cm.

Does a bigger QR code always scan better?

Up to a point, yes. A larger code is easier to resolve, as long as you keep strong contrast and a clear quiet zone around it.

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