All paper sizes and envelope formats in a row | Dimensions included

Anyone involved in printing, direct mail or personalised cards will soon have to deal with different paper and envelope formats. But which format do you use when? Which envelope fits an A4 or A5? And what exactly do names like C4, C5 or EA5/6 mean?

In this blog, we clearly list the most common paper sizes and envelope formats. Including dimensions, applications and useful tips for direct mail and printing.

 

What are paper sizes?

Paper sizes are standard sizes used worldwide for documents, flyers, cards, posters and printed matter. The best-known series is the A-series. Here, each size always has the same ratio. An A4, for example, is exactly half the size of an A3. This makes the formats practical for printing, scaling and folding.

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Overview of the most commonly used paper sizes

• A0 format = 841 x 1189 mm

A0 is the largest standard format within the A series. This format is mainly used for technical drawings, large posters and presentations.

• A1 format = 594 x 841 mm

A1 is widely used for posters, trade show materials and large visuals that need to be easily visible from a distance.

• A2 format = 420 x 594 mm

A2 is popular for promotional posters, presentations and eye-catching displays.

• A3 size = 297 x 420 mm

A3 is often used for menus, brochures and folded printed matter.

• A4 size = 210 x 297 mm

A4 is the best-known paper size and is used for letters, offers, documents and flyers.

• A5 format = 148 x 210 mm

A5 feels more compact and is widely used for invitations, booklets and direct mailings.

• A6 format = 105 x 148 mm

A6 is ideal for postcards, thank-you cards and compact promotional items

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What are envelope formats?

Envelope formats are tailored to the dimensions of the paper they contain. The right envelope ensures a professional look and prevents documents from getting damaged or taking up unnecessary space. At mailings the size of the envelope also plays an important role in the recipient's first impression.

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Overview of the most commonly used envelope formats

C4 envelope = 229 x 324 mm

Suitable for unfolded A4 documents. Ideal for contracts, brochures and important business mail.

EA4 envelope = 220 x 312 mm

Similar to C4, but slightly smaller, often used for business mailings.

C5 envelope = 229 x 162 mm

Perfect for a once-folded A4 or an unfolded A5.

EA5 envelope = 220 x 156 mm

A compact and popular format for direct mail campaigns and cards.

C6 envelope = 114 x 162 mm

Commonly used for A6 cards, invitations and thank-you cards.

EA5/6 envelope = 114 x 220 mm

An oblong format often used for commercial mailings and promotional mail.

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Which envelope fits which paper size?

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Why are format choices important in direct mail?

At physical marketing tools is not only about content, but also about presentation. A larger format is more likely to stand out on the doormat, while a compact format can feel personal and accessible.

Also, the format chosen affects:

• Shipping costs
• Content protection
• Opening experience
• Appearance of your brand
• Sustainability and use of materials

By cleverly matching paper and envelope, you ensure a mailing that looks professional and is pleasantly received.

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Need help choosing the right format?

At LocoMail, we help businesses every day with creative direct mailings, original gift vouchers and eye-catching packaging. From the right paper format to a suitable envelope: we are happy to help you find the best solution for your mailing!