The most common signage design mistakes are text sized incorrectly for the viewing distance, poor colour contrast, overly decorative fonts, cluttered messaging, inconsistent branding across multiple signs, poor night-time lighting, wrong materials, poor placement, bad letter spacing, and skipping installation quality checks. Most of these are simple to fix once you know exactly what to look for.
Key Takeaways
• A general rule for legible text size is about one inch of letter height for every ten feet of viewing distance
• Poor colour contrast doesn’t just look bad, it genuinely affects readability for people with colour blindness or visual impairment
• Inconsistent signage across multiple locations quietly undermines a brand the same way inconsistent packaging does
• Cluttered signage with too much text is one of the most common and most fixable mistakes businesses make
• Saga Designs designs signage for Melbourne businesses that avoids these mistakes from the first draft, not after a costly reprint
Introduction
Most signage mistakes aren’t really design failures, they’re small, specific oversights that happen when the sign is judged by how it looks up close on a screen, not how it actually performs from the distance a real customer will see it. If you’re new to signage generally, our guide on what signage actually is is a good place to start before this one.
This guide breaks down the mistakes that come up constantly across signage projects, including one specific, measurable rule most guides only mention in passing.
Mistake One: Text Sized Wrong for the Viewing Distance
The most common signage mistake is sizing text for how it looks up close rather than how it needs to perform from the actual distance it’ll be read, and there’s a specific, useful rule for getting this right, roughly one inch of letter height for every ten feet of viewing distance.
This single detail causes more signage failures than almost anything else. A logo that looks perfectly proportioned on a laptop screen can become genuinely unreadable once it’s enlarged onto a sign and viewed from across a car park or a busy street. The fix is straightforward once you know it, before finalising any sign, work out the realistic distance it’ll actually be read from, then size the text to that distance specifically, not to how it looks on your monitor.
Mistake Two: Poor Colour Contrast
Low contrast between the text and the background colour makes a sign genuinely difficult to read, and this isn’t just a design preference, it directly affects people with colour blindness or low vision far more than it affects everyone else.
This is worth taking more seriously than it usually gets taken. A sign that reads fine to one person can be effectively unreadable to a meaningful portion of the population if the contrast between the text and background is too close. Testing a colour combination from across a room, in different lighting conditions, catches most contrast problems before they become a permanent, expensive mistake.
Mistake Three: Overly Decorative or Stylised Fonts
A font that looks elegant or distinctive up close can lose legibility entirely once it’s enlarged and viewed from a distance, particularly script or highly stylised fonts, which tend to blur together at signage scale.
This is a common trap for businesses wanting their signage to feel unique or premium. The instinct is understandable, but a sign that looks beautiful and can’t actually be read quickly fails at its one real job. Clear, simple fonts consistently outperform decorative ones for anything meant to be read at speed or from a distance, reserving stylistic flourishes for smaller, closer materials like business cards or menus instead.
Mistake Four: Cluttered Messaging
Cramming too much information onto one sign overwhelms the person trying to read it, since most signage only has a few seconds to communicate before someone’s attention moves on.
A sign isn’t a brochure, and trying to make it do a brochure’s job usually means it fails at doing a sign’s actual job, getting one clear message across quickly. If there’s genuinely more detail a customer might need, a QR code linking to a website or menu is often a better solution than cramming everything onto the physical sign itself.
Mistake Five: Inconsistent Branding Across Multiple Signs
Using different colours, fonts, or logo treatments across different signs at the same business quietly undermines brand recognition, the same way inconsistent packaging does across a growing product range.
This is genuinely the same underlying problem we’ve written about for product packaging, just showing up in a different medium. A business with a slightly different shade of its brand colour on its shopfront sign, its vehicle signage, and its window graphics reads as disorganised, even if each sign looks fine on its own. The fix is the same too, defining exact colour codes and fonts once, then applying them consistently everywhere signage appears.
Mistake Six: Poor Lighting for Night-Time Visibility
A sign that’s clearly visible during the day can become effectively invisible after dark if it isn’t properly lit, which matters significantly for any business with evening trade or foot traffic.
An unlit or poorly lit sign doesn’t just look less impressive at night, it stops doing its job entirely for a meaningful portion of the day. This is worth factoring in from the design stage, not as an afterthought once the sign’s already manufactured, since retrofitting lighting onto an existing sign is far more expensive than designing for it from the start.
Mistake Seven: Wrong Materials for the Environment
Choosing signage materials without considering how they’ll actually hold up to sun, rain, and general weather exposure leads to fading, warping, or damage well before the sign should need replacing.
Our guide to outdoor signage materials for Australian weather covers this in more detail, but the short version is that the cheapest material option upfront is often the most expensive one over time, once you factor in early replacement. Matching the material to the actual conditions the sign will face saves money in the long run, even if it costs slightly more initially.
Mistake Eight: Poor Placement That Blocks Visibility
Even a well designed sign fails if it’s positioned somewhere that’s obstructed by trees, other signage, or architectural features, or placed at a height and angle that doesn’t suit how people actually approach the building.
This mistake often has nothing to do with the sign’s design at all, the artwork can be flawless and still underperform badly if it’s mounted somewhere half hidden. It’s worth genuinely walking or driving past the intended location before finalising placement, not just assuming a spot will work because it seems logical on a plan.
Mistake Nine: Poor Letter Spacing and Kerning
Uneven spacing between letters, particularly when text is stretched, compressed, or manufactured without care, makes a sign harder to read even when the font choice and size are otherwise correct.
This is a subtler mistake than the others, but a genuinely common one, particularly on DIY or budget signage where letters get squeezed to fit a fixed space rather than the layout being properly planned around the text from the start. Some fonts also adjust spacing between certain letter pairs automatically, and that spacing doesn’t always transfer correctly once a sign goes into production, which is worth checking with whoever’s actually manufacturing it, not just assumed to carry over cleanly from the design file.
Mistake Ten: Skipping Installation Quality Checks
Treating installation as a formality rather than a real step in the process leads to signs that are crooked, poorly secured, or positioned slightly differently from how they were designed to sit.
A sign that’s been carefully designed can still look unprofessional if it’s installed unevenly or without the same attention to detail that went into the artwork itself. This is worth confirming directly with whoever’s installing your signage, whether there’s a final check against the original design before the job is considered complete, rather than assuming the installation will automatically match the plan.
Frequently Asked Questions
What is the most common signage mistake businesses make?
Sizing text for how it looks up close rather than the actual distance it needs to be read from is one of the most common and most consequential mistakes, since it directly affects whether a sign works at all from a realistic viewing distance.
How do I know if my signage has enough contrast?
Test it from across a room or from the actual distance it’ll be viewed from, in different lighting conditions. If it’s hard to read at a glance under normal conditions, the contrast likely needs adjusting before it goes into production.
Can I fix a signage mistake after it’s already installed?
Sometimes, depending on the issue. Lighting can often be added retroactively, and placement can sometimes be adjusted. Font size and contrast issues usually require reprinting or remanufacturing the sign itself, which is why catching these mistakes before production matters.
Why does inconsistent signage hurt a business?
Inconsistent colours, fonts, or styling across different signs makes a business look less organised and less trustworthy, even if each sign looks acceptable on its own. Customers notice the mismatch, even when they can’t articulate exactly what feels off.
How much does it cost to fix common signage mistakes?
Cost depends on whether the fix requires a full reprint or remanufacture, or a smaller adjustment like added lighting or repositioning. Catching these mistakes at the design stage, before production, avoids the cost entirely.
Does poor installation count as a design mistake?
Not directly, but it undermines even the best design. A sign that’s crooked or poorly secured looks unprofessional regardless of how well it was designed, so it’s worth confirming installation quality is checked before a project is considered finished.
Conclusion
Most signage mistakes are avoidable once you know specifically what to check for, sizing for real viewing distance, genuine contrast, consistent branding, and materials suited to where the sign actually lives. Saga Designs is a signage company in Melbourne that catches these issues at the design stage, not after a costly reprint. Get in touch for a free quote based on your project.
