When it comes to printing, paper size matters. Choosing the right size can make your documents look more professional and easier to read. Whether you’re printing posters, flyers, business cards, or brochures, knowing the correct paper size helps you get the best results.
In this blog, we’ll explain the most common paper sizes, what they are used for, and some helpful tips from the printing industry.
Most Common Paper Size Standards
There are two main paper size systems:
- ISO A Series (Used in the UK and most countries)
- North American Sizes (Used mostly in the USA and Canada)
Since we’re based in London, we mostly use the A series sizes.
📄 A Series Paper Sizes (ISO 216 Standard)
This is the most popular paper size range in the UK and Europe. Here’s a quick look at the A-series sizes:
| Size | Dimensions (mm) | Common Uses |
| A0 | 841 x 1189 mm | Posters, architectural drawings |
| A1 | 594 x 841 mm | Flip charts, posters |
| A2 | 420 x 594 mm | Calendars, medium posters |
| A3 | 297 x 420 mm | Presentations, drawings |
| A4 | 210 x 297 mm | Letters, documents, brochures |
| A5 | 148 x 210 mm | Flyers, invitations |
| A6 | 105 x 148 mm | Postcards |
| A7 | 74 x 105 mm | Labels, small cards |
Fun Fact: Each size is exactly half the size of the one above it. A4 is half of A3, and A5 is half of A4.
Common Uses for Paper Sizes
Here’s how different paper sizes are often used in business and events:
- A4 – The most common paper for letters, invoices, and everyday documents.
- A5 – Great for leaflets, handouts, and small booklets.
- A3 – Often used for posters, menus, or designs that need more space.
- A2, A1, A0 – Perfect for large signs, exhibitions, and advertising posters.
- A6 & A7 – Great for thank-you cards, vouchers, or pocket-sized promotions.
Industry Tips for Choosing Paper Sizes
- Know Your Audience: A4 is standard and safe, but if you’re targeting a creative audience, A5 or A6 could stand out more.
- Design Accordingly: Always design your content with the final size in mind. Margins, images, and text should fit well.
- Consider Cost: Smaller sizes often cost less, but if you need visual impact, larger formats are worth it.
- Ask Your Printer: If you’re unsure, ask a professional printing service like East London Printer to guide you.
- Purpose Matters: Use A0–A2 for visibility (like posters), A4–A5 for reading material, and A6–A7 for portability.
Why Paper Size Affects Your Print Job
Choosing the wrong paper size can lead to wasted material, extra cost, and unprofessional-looking results. If your flyer design doesn’t match your print size, it may get cropped or look stretched.
At East London Printer, we help you pick the perfect size for your project, ensuring your work looks clean, sharp, and professional.
Trust East London Printer for All Your Printing Needs
From business cards to large exhibition posters, our team knows which paper size suits your project best. We’re fast, professional, and always happy to help.
Looking for guidance on your next print job?
📞 Call us at: +44 (0)20 7041 9649
📧 Email: hello@eastlondonprinter.co.uk
🌐 Visit: East London Printer
Final Thoughts
Choosing the right paper size makes a big difference in how your print materials look and feel. Whether you’re printing event invites, signs, brochures, or menus—understanding paper dimensions helps you save time and money.
Let East London Printer handle your print jobs with care, speed, and expert advice. We’re here to make your ideas come to life—on the perfect paper size.
