INTRODUCTION
Here’s the twist
Most business owners focus on design first.
But what most don’t realise is that size directly affects cost, impact, postage, and readability.
The #1 mistake?
Choosing a brochure size based on guesswork instead of purpose.
If you wait, your competitor might already be using the right format to look more professional without spending more.
Let’s break down the average size of a bifold brochure properly.
What Is a Bifold Brochure?
A bifold brochure is a single sheet folded once in half, creating:
- 4 panels
(Front cover, inside left, inside right, back cover)
It opens like a small booklet.
What Is the Average Size of a Bifold Brochure?
In the UK, the most common bifold brochure sizes are:
1️⃣ A4 Folded to A5 (Most Popular)
- Flat size: 297mm x 210mm (A4)
- Folded size: 210mm x 148mm (A5)
✔ Compact
✔ Easy to distribute
✔ Cost-effective
✔ Professional look
This is the most widely used standard size.
2️⃣ A3 Folded to A4 (Larger Format)
- Flat size: 420mm x 297mm (A3)
- Folded size: 297mm x 210mm (A4)
✔ More space for visuals
✔ Ideal for product catalogues
✔ Premium presentation
Best for corporate profiles or property brochures.
3️⃣ DL Size (Less Common for Bifold)
- Flat size: 210mm x 198mm
- Folded size: 210mm x 99mm
This is more common for trifold, but can be adapted.
Quick Size Comparison Table
| Flat Size | Folded Size | Best For |
|---|---|---|
| A4 | A5 | Most businesses |
| A3 | A4 | Detailed or premium brochures |
| Custom | Custom | Unique branding needs |
Why Size Matters
| Feature | Advantage | Benefit |
|---|---|---|
| A4 folded to A5 | Compact | Easy handling |
| A3 folded to A4 | Larger visuals | Stronger impact |
| Standard sizes | Lower print cost | Budget-friendly |
| Custom sizes | Unique branding | Memorable impression |
| Proper proportion | Balanced layout | Better readability |
Loss aversion insight:
Choosing the wrong size can mean higher print costs, awkward postage, or cluttered content.
Key Questions People Ask
Is A4 folded to A5 a bifold brochure?
Yes. That’s the most common bifold brochure size in the UK.
Are bifold brochures bigger than trifold brochures?
Usually yes. Trifolds are often DL-sized and more compact, while bifolds tend to feel larger and more open.
What is the best size for a professional look?
For most local businesses:
✔ A4 folded to A5
For premium branding:
✔ A3 folded to A4
If you’re unsure, professional Brochure Design Services can guide you based on your goals and audience.
Common Mistakes to Avoid
- Choosing oversized formats without enough content
- Ignoring mailing restrictions
- Designing without bleed allowance
- Using low-resolution images for larger formats
- Not matching size with marketing purpose
Before:
Guessing the size and hoping it works.
After:
Strategic sizing aligned with branding and distribution.
Bridge:
Planning before printing.
How to Choose the Right Bifold Size for Your Business
Ask yourself:
- Will this be handed out or mailed?
- Is it image-heavy or text-heavy?
- Do I want premium impact or budget efficiency?
- How much content do I actually have?
Quick Recommendation
✔ Local service promotion → A4 folded to A5
✔ Corporate or property marketing → A3 folded to A4
✔ Limited budget bulk printing → Standard A4 bifold
If you’re exploring options, professional Brochure Printing Services can ensure the correct dimensions, bleed setup, and fold precision.
Final Thoughts – Size Impacts Perception
So, what is the average size of a bifold brochure?
👉 A4 folded to A5 is the most common and practical choice.
Before:
Uncertain size, wasted print budget.
After:
Professional dimensions aligned with your brand.
👉 Ready to grow your business with perfectly sized bifold brochures? Contact Social Media Max today.
Don’t wait your competitors won’t.