Choosing the right flyer size can make a real difference to how effectively your marketing message reaches potential customers. If you’re wondering what size flyer is best for your campaign, the answer depends on how you plan to distribute your flyers, how much information you need to include and the impression you want to create.
In this guide, we’ll compare the most popular flyer sizes in the UK, explain their practical uses and help you choose a format that suits your marketing objectives and budget.
What Are the Standard Flyer Sizes in the UK?
Most UK printing companies offer several common flyer sizes, including A6, A5, A4 and DL. Each format provides a different amount of space for text, images and branding, making some better suited to particular marketing activities than others.
| Flyer size | Dimensions | Typical uses |
| A6 | 105 × 148 mm | Handouts, event promotions, discount vouchers |
| A5 | 148 × 210 mm | Door drops, local advertising, promotional campaigns |
| A4 | 210 × 297 mm | Detailed promotions, product information, menus |
| DL | 99 × 210 mm | Price lists, promotional inserts, rack cards |
A4, A5 and A6 belong to the internationally recognised ISO A-series of paper sizes. DL is a widely used commercial print format with a narrower, longer shape.
A6 Flyers: Compact and Convenient for Quick Promotions
An A6 flyer measures 105 × 148 mm, making it approximately the size of a standard postcard. Its compact dimensions make it easy to carry, distribute and store, particularly when your campaign involves handing printed materials directly to members of the public.
A6 flyers work particularly well for straightforward promotional messages. You might use them to advertise an upcoming event, promote a limited-time discount, introduce a new service or encourage customers to visit your website.
Because space is limited, an A6 design benefits from a strong headline, an eye-catching image and a clear call to action. Trying to include too much information can make the flyer difficult to read.
A5 Flyers: A Versatile Choice for Everyday Marketing
An A5 flyer measures 148 × 210 mm, which is half the size of an A4 sheet. It provides considerably more space than A6 without becoming difficult to handle or distribute.
For many businesses, A5 is a useful starting point when choosing a flyer size. It offers enough room for a prominent headline, supporting images, a short explanation of your services and clear contact details.
A restaurant might use an A5 flyer to advertise a special menu, while a gardening company could use the same format to promote seasonal maintenance services. Retailers can also use A5 flyers to highlight several offers without overwhelming the design.
If you’re comparing A5 vs A6 flyers, consider the amount of information you need to communicate. A6 encourages a shorter, more direct message, while A5 provides greater flexibility for images, descriptions and promotional details.
A4 Flyers: More Space for Detailed Information
A4 flyers measure 210 × 297 mm, providing the largest printable area of the four formats discussed in this guide.
The additional space makes A4 particularly useful when your campaign involves several products, detailed service information, multiple images or a more complex message.
However, larger does not automatically mean more effective. An A4 flyer may be less convenient for quick street distribution, particularly if recipients need to carry it around.
DL Flyers: A Slim Format for Targeted Promotions
DL flyers measure 99 × 210 mm, giving them a long, narrow appearance that distinguishes them from traditional A-series formats.
This shape can work particularly well for price lists, promotional inserts, appointment information, event programmes and marketing materials displayed in leaflet holders.
The narrow layout does require careful design. Wide photographs, large tables and lengthy paragraphs may be difficult to accommodate without reducing readability.
DL flyers are also suitable for direct mail campaigns because their 99 × 210 mm dimensions allow them to fit inside standard DL envelopes measuring 110 × 220 mm without folding. This makes them a practical choice for promotional mailings, price lists and correspondence inserts.
Which Flyer Size Is Best for Different Marketing Campaigns?
Flyers for Door-to-Door Distribution
A5 is often a practical choice for door-to-door advertising because it offers enough space to explain a service or promotion while remaining relatively compact.
Before arranging a large distribution campaign, check any size, weight and packaging requirements set by your delivery provider. Royal Mail and private distribution companies may apply different specifications.
Flyers for Events and Exhibitions
A6 flyers are convenient for promotional teams who need to carry and distribute large quantities of printed materials.
A5 can be a better choice when you need to include a programme, several activities or additional event details.
Flyers for Shops, Restaurants and Hospitality Businesses
A5 provides space for offers, product photographs and descriptions, while DL can work particularly well for compact menus, treatment lists and promotional inserts.
Flyers for Professional Services
An A5 flyer can introduce a business and summarise its main services, while A4 provides room for more detailed explanations, testimonials or supporting information.
Should You Choose a Flyer or a Folded Leaflet?
A flyer is generally a single, unfolded sheet of paper designed to communicate a promotional message quickly. It might advertise an event, introduce a service or highlight a special offer.
A folded leaflet uses one or more folds to divide the printed material into panels. Common examples include half-fold and tri-fold designs, which provide separate areas for different types of information.
If your campaign relies on a simple headline, strong image and immediate call to action, a flat flyer may be sufficient. If customers need more information before making a decision, a folded leaflet or brochure could offer greater flexibility.
How Does Flyer Size Affect Printing Costs?
Smaller flyers generally use less paper, but the final price also depends on the quantity ordered, printing method, paper specification, number of printed sides and any finishing requirements.
A smaller flyer may cost less to produce, but it will not necessarily provide better value if the limited space prevents you from communicating your message effectively.
When comparing quotations, request prices for the quantities and sizes you are considering. This will help you make a decision based on actual costs rather than assumptions.
How to Prepare Your Flyer Artwork for Printing
Many UK commercial printers request a 3 mm bleed around the outside of the finished design. Bleed extends background colours and images beyond the cutting line, helping prevent unwanted white edges after trimming.
Printers also commonly recommend keeping important text, logos and contact details at least 3 mm inside the finished edge. This is known as a safe margin.
These are common guidelines rather than universal specifications, so always confirm the exact requirements with your chosen printer before submitting artwork.
If your flyer includes a QR code, make sure it remains large enough to scan comfortably. Test it using the final design rather than relying on how it appears when enlarged on a computer screen.
What Makes a Flyer Effective Beyond Its Size?
Start with a headline that tells readers why they should pay attention. This might introduce a special offer, highlight a useful service or announce an event.
Supporting text should explain the main benefit without overwhelming the reader. Focus on what customers need to know rather than attempting to include every detail about your business.
Your flyer should also include an obvious next step. Depending on your campaign, this might involve visiting a website, calling your business, scanning a QR code or attending an event.
So, What Size Flyer Is Best for Your Business?
A6 is particularly useful for compact handouts and simple promotional messages. A5 offers a versatile balance between space and convenience, making it suitable for many everyday marketing activities.
A4 provides room for detailed information, while DL offers a distinctive narrow format for price lists, promotional inserts and targeted communications.
It can also help to print a sample of your design at its intended size. This allows you to assess the readability, image proportions and overall appearance before committing to a larger order.
For practical advice and a quotation, King Print offers professional flyer printing for businesses planning their next marketing campaign.