Yes, the standard A4 letterhead size is 210 mm × 297 mm (8.27 × 11.69 inches), which matches a standard sheet of A4 paper. This is the universal size for business letterheads in most countries outside North America, where the comparable size is US Letter (8.5 × 11 inches).
Why A4 Is the Global Standard
A4 is part of the ISO 216 paper size system, which was first adopted in Germany in 1922 and later became the international standard in 1975. The system is based on a simple ratio: each size is half the area of the next larger size, with the length-to-width ratio kept constant at √2:1 (approximately 1.414). This means that when you fold an A4 sheet in half, you get an A5 sheet with the same proportions—a feature that makes scaling documents between sizes seamless.
Today, A4 is used in nearly every country except the United States, Canada, and a few others that rely on the US Letter size. If you are designing a letterhead for international clients or printing in a country that uses the metric system, A4 is almost certainly the expected size.
How A4 Dimensions Affect Letterhead Design
The 210 × 297 mm dimensions give you a printable area that is slightly narrower and taller than US Letter. This affects where you place your logo, contact information, and margins. A typical A4 letterhead has a top margin of about 25–30 mm, side margins of 20–25 mm, and a bottom margin of 20–30 mm, but these can vary depending on your design and printer capabilities.
Most home and office printers cannot print edge-to-edge, so you’ll need to leave at least a 5 mm unprinted border on all sides. If you want a full-bleed design (where color or images extend to the edge), you must use a professional printing service that can trim the paper after printing. Otherwise, keep all critical elements—like your logo and contact details—well within the printable area.
How to Set Up an A4 Letterhead in Word or Google Docs
Setting up an A4 letterhead in a word processor is straightforward, but you need to ensure the page size is set correctly from the start. Here’s how:
- Open a new document and go to Page Setup (in Word: Layout → Size; in Google Docs: File → Page Setup).
- Choose A4 from the paper size dropdown. If it’s not listed, enter the custom dimensions 21 cm × 29.7 cm (or 210 mm × 297 mm).
- Set your margins. For a standard letterhead, use 2.5 cm top, 2 cm sides, and 2 cm bottom, but adjust to fit your design.
- Insert your logo, company name, and contact information in the header area (usually within the top 3–4 cm).
- Add a footer with your website, email, or registration number if needed.
- Save the file as a template (Word: .dotx; Google Docs: Template Gallery) so you can reuse it for future letters.
Remember that if you are sending the letterhead digitally as a PDF, the recipient’s printer may default to a different paper size. Always check the PDF page size before sending, and consider embedding fonts to avoid layout shifts.
Common Problems with A4 Letterhead Size
One of the most frequent issues is accidentally printing an A4 document on US Letter paper (or vice versa). This can cause the letterhead to be cut off at the bottom or have uneven margins. Always double-check the printer settings before printing, and set the paper size to match the document.
Another issue is that some online design tools (like Canva or Adobe Express) default to US Letter. If you’re using such a tool, you must manually change the canvas size to 210 × 297 mm. If you don’t, your letterhead will be the wrong dimensions when printed on A4.
Finally, if you’re creating a letterhead that will be used for both email and print, remember that the digital version does not need to be A4—it can be any aspect ratio. But for print, always use A4 to avoid scaling issues.
Letterhead A4 vs. US Letter: Key Differences
The main difference is width: A4 is 210 mm wide, while US Letter is 216 mm (8.5 inches). That 6 mm difference may seem small, but it can cause problems when copying or printing. US Letter is also shorter: 279 mm (11 inches) compared to A4’s 297 mm. So A4 is narrower and taller.
If you’re designing a letterhead that will be used in both systems, you might consider creating two versions. Alternatively, you can design with generous margins so that the content fits within both sizes. Some international companies use a “universal” letterhead that works on both, but it often looks less polished on one of the sizes.
How to Choose the Right Paper Weight and Finish
Paper weight is measured in grams per square meter (gsm). For a professional letterhead, 90–120 gsm is typical. Heavier paper (120–150 gsm) feels more premium but may not feed through all home printers. If you’re printing at home, stick to 90–100 gsm to avoid jams.
Finish also matters: matte or uncoated paper is easiest to write on with a pen and is the most common for letterheads. Glossy or coated paper looks vibrant but can smudge with inkjet printers and is harder to write on. For a standard business letter, uncoated paper is usually the best choice.
Costs of Printing A4 Letterheads
Printing costs vary widely. At home, an inkjet printer might cost you about 5–10 cents per page for black-and-white and 15–30 cents for color, depending on ink prices. Laser printers are cheaper per page (2–5 cents for black-and-white) but have higher upfront costs.
For professional printing, a run of 500 A4 letterheads on 100 gsm paper might cost between $50 and $150, depending on the print shop and whether you need full color or special finishes. Digital printing is cheaper for small runs, while offset printing becomes cost-effective only for quantities above 1,000.
To save money, consider printing your letterhead only on the first page of a letter and using plain paper for subsequent pages. Many businesses do this to reduce costs.
Template for A4 Letterhead
Company Name
Address Line 1
Address Line 2, City, Postal Code
Phone: _______________ Email: _______________
Date: _______________
Recipient Name
Recipient Title
Company/Organization
Recipient Address
Dear _______________,
Body of letter: ______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
Sincerely,
_________________________
Your Name
Your Title
Sample (fictional): “BlueSky Consulting, 12 Maple St., Springfield, IL 62701, Phone: 555-123-4567, Email: info@bluesky.example. Date: March 15, 2025. Recipient: Jane Doe, HR Manager, Acme Corp, 88 Oak Ave. Dear Jane, …”
Frequently Asked Questions
Is A4 the same as 8.5 × 11?
No. A4 is 210 × 297 mm (8.27 × 11.69 inches), while US Letter is 8.5 × 11 inches (215.9 × 279.4 mm). They are close but not identical; A4 is slightly narrower and taller.
Can I print an A4 letterhead on a US printer?
Yes, but you’ll need to set the paper size to A4 in your printer settings, and your printer must physically support A4 paper (most do). If your printer only takes US Letter, you can print with “fit to page” scaling, but that will distort the layout.
What is the best margin for an A4 letterhead?
A safe margin is 2 cm on all sides, but for a professional look, use 2.5 cm top, 2 cm sides, and 2 cm bottom. Always keep at least 5 mm clear of the edges for printers that can’t print edge-to-edge.
Should I use a letterhead template from Word or design my own?
Word templates are quick and easy, but they often look generic. Designing your own (or using a professional designer) gives you more control over branding. If you’re not design-savvy, a template is a good starting point, but customize it with your logo and colors.
Do I need a separate letterhead for email?
No, but you may want a simplified version for email that is smaller and optimized for screen viewing. A standard A4 letterhead is too large for an email signature; instead, create a banner or signature block with your logo and contact info.
What file format should I use for my A4 letterhead?
For printing, use a PDF with embedded fonts and CMYK color mode. For editing, keep the source file (e.g., .docx, .indd, .ai) so you can make changes. For web use, export a PNG or JPG at 150–300 DPI.