QR Code Size for Posters and Flyers: A4, A3, and Wall Display Guide

1. Quick Reference

| Format | Typical scan distance | Recommended code size | |---|---|---| | Handheld flyer (A5) | 30 to 40 cm | 3 to 4 cm | | A4 flyer or notice | 40 to 60 cm | 4 to 5 cm | | A3 poster at a wall | 1 to 1.5 m | 10 to 15 cm | | Large wall display | 2 to 3 m | 20 to 30 cm |

2. Placement

Place the code in the lower third so people can hold a phone comfortably, and never at the extreme corner where trimming can cut the quiet zone.

3. Add Context

Include a short call to action and a fallback URL. Use matte paper to avoid glare from overhead lights.