One of the most common print questions — and biggest sources of confusion — is resolution. People assume that bigger prints need higher DPI, so they send enormous files, or panic that their image is "only 72 DPI". The truth is more useful: for large-format printing, viewing distance matters far more than raw DPI, and a banner needs much less resolution than a business card. This guide explains how it really works, so your prints look sharp without wrestling giant files. It is part of our complete guide to large-format printing.
DPI is not a fixed property of your file
"DPI" only means something at a given print size. The same image is "high DPI" printed small and "low DPI" printed huge — because DPI is just pixels divided by print size. So "my image is 72 DPI" tells you nothing on its own; what matters is how many pixels it has, and how big you print it. The right question is never "what DPI is my file?" but "how many pixels, at what size, viewed from how far?".
Viewing distance is the real rule
Here is the key insight large-format printing depends on: the further away something is viewed, the less resolution your eye can resolve. A business card held at 30 cm needs ~300 DPI. A banner read from 2 metres needs far less; a billboard read from 50 metres needs almost none. Your eye simply cannot see the detail at distance, so printing it is wasted. This is why a roll-up banner and a billboard are produced at very different resolutions and both look perfect.
Practical resolution targets
At final print size, these are safe targets:
| Viewed from | Resolution at full size |
|---|---|
| Close (≤0.5 m) — small posters | 150 DPI |
| 1–2 m — roll-ups, banners | 100–150 DPI |
| Several metres — large banners | 72–100 DPI |
| Far / building-size | 25–50 DPI |
A PVC banner read from a metre or two at ~100–150 DPI looks crisp; pushing it to 300 just quadruples the file for detail no one can see.
Use vectors where you can
Resolution only limits raster images (photos). Vector artwork — logos, text, shapes drawn in Illustrator — has no resolution; it prints crisp at any size. So build logos and text as vectors and they are perfect on a banner of any size, with photos as the only part you size for distance. Our print-ready file setup guide covers supplying both correctly.
How to avoid a blurry print
- Start with enough pixels for the size and distance — you cannot add detail that was never captured. Enlarging a small image just magnifies its blur.
- Don't up-res a tiny web image to banner size and expect sharpness.
- Send vectors for logos and text.
- Check at 100% on screen at print size to preview sharpness.
If you are unsure whether an image is big enough, send it over — we will tell you the largest size it prints cleanly. A premium UV banner deserves artwork that holds up.
Frequently asked questions
What DPI do I need for a banner? About 100–150 DPI at full size for a banner viewed from a metre or two — much less than the 300 DPI a close-up print needs.
Is higher DPI always better? No — beyond what your eye can see at the viewing distance, extra DPI just makes a huge file with no visible benefit.
Why does my image look blurry printed large? It probably had too few pixels for the size, and enlarging magnified the blur. You cannot add detail that was not captured.
Do logos and text need high resolution? No — supply them as vectors and they print crisp at any size. See the banner range.
