QR Code Size for Posters and Signs
Start with where the reader will stand, rather than the paper size. An A4 notice at eye level and a shop window seen across a pavement need different tests. The code below can be exported for either layout.
The name goes into the PDF exactly as typed; the on-screen color is an approximation and print output may differ.
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Choose a poster QR size with a physical proof
- 01
Mark the likely viewing position and check that readers can safely stop there. Put the destination label beside the code and leave room for its clear margin.
- 02
Choose a starting size in the layout. A distance divided by ten estimate is only a rough planning aid, not a scanning guarantee or a QR standard.
- 03
Print the code at the planned size and place the proof at the actual height. Scan from the viewing position in the intended lighting, then enlarge or reposition it if needed.
Where people use it
Indoor notices
Test under the lighting used when visitors arrive. A code that scans at a desk may sit behind a reflection in a framed notice.
Shop windows
Check reflections and the distance between the pavement and glass. Keep the code away from window joins and other graphics.
Event signs
Leave enough space for people to stop and scan. Check the installed sign from both standing and seated positions where relevant.
There is no universal poster QR minimum
Reading depends on module size, camera resolution, encoded content, contrast and surroundings. DENSO WAVE advises choosing module size with both the printing process and scanner in mind. A fixed width in centimeters cannot cover every phone and placement. Treat any size chart as a starting point for a proof.
A planning example, not a scan guarantee
Using the rough distance divided by ten estimate, a viewing distance of 1 meter suggests trying a 10 centimeter code. This is arithmetic for a draft layout, not a measured result from qrforprint. Test the printed sample and include the clear margin in the space you reserve on the poster.
Keep the code sharp as the poster grows
Use a simple SVG QR design for large layouts, or a raster export with enough pixels at its final size. Avoid adding more encoded text when a short destination URL will do. Keep the code off curved edges and leave nearby decorative artwork outside its clear margin.
Related guides
Frequently asked questions
What size QR code does an A3 poster need?＋
A3 is the paper size, not a scanning distance. Choose the code size from the reader's position and confirm it with a full size print proof.
Is the 10:1 distance rule a standard?＋
No. It is a rough planning estimate. It does not account for every camera, code density, surface or lighting condition, and it cannot replace a physical scan test.
Does using SVG guarantee a scan?＋
No. SVG can preserve the geometry of a plain QR code when scaled, but the finished print still needs suitable size, contrast, clear margins and a reachable destination.