Letterhead Sizes

Sep 02, 2025

Navigating the world of letterhead sizes is essential for any business aiming to make a professional impression. This guide introduces you to a variety of letterhead sizes, enriched with practical letterhead examples and formats. Tailored for businesses and professionals, it provides insights on how to select the right size to complement your brand identity and communication style. From standard dimensions to custom choices, learn how to choose a letterhead size that not only looks great but also aligns with your corporate needs.

Letterheads have different sizes just like other forms of graphic design, and these rely on the types of documents they’re included in. Without further ado, let’s discover the various letterhead sizes and dimensions.

Standard Letterhead Sizes

US

US size is 8.5 × 11 in inches, 215.9 × 279.4 in millimeters, and 21.59 × 27.94 in centimeters. For digital use, the best resolution for US letterheads is 2550 × 3300 pixels.

UK

UK size is 8.27 × 11.7 in inches, 210.058 × 297 in millimeters, and 21 × 29.7 in centimeters. This letterhead size is commonly used in Europe and has a recommended digital resolution of 3508 × 2480 pixels.

A4

A4 measures 8.27 × 11 inches, only a hair larger than the UK size. In millimeters, it measures 210.058 mm × 279.4 mm (21.06 cm × 27.94 cm). If you want to upload an A4-sized letterhead, set its resolution to 3508 × 2480 pixels.

Legal

Legal letterheads measure 8.5 × 14 in inches, 215.9 × 355.6 in millimeters, and 21.59 × 35.56 in centimeters. Their ideal resolution for digital viewing is 3400 × 5600 pixels.

Tabloid

Tabloid is 11 × 17 inches, 279.4 × 431.8 in millimeters, and 27.94 × 43.18 in centimeters. Tabloid letterheads to be shown digitally should at least be 3300 × 5100 pixels.

Letter-half letterheads measure 5.5 × 8.5 in inches, 139.7 × 215.9 in millimeters, and 13.97 × 21.59 in centimeters. Should you wish to upload letter-half-sized letterheads digitally, make sure that it has 3400 × 2200 pixels.

Letterhead Sizes for Digital – Social Media

Facebook Letterhead Size

For Facebook image timeline posts with letterheads, the recommended size is 1200 × 630 pixels and at least a minimum of 600 × 315 pixels for great-quality images. For Facebook feed ads and marketplace ads, 1080 × 1080 pixels.

Twitter Letterhead Size

If you plan to post in-stream images with letterheads on Twitter, the minimum pixel size is 600 × 335 and the most recommended pixel size is 1600 × 1900.

Instagram Letterhead Size

There are three ideal pixel sizes for Instagram posts with letterheads. For square-oriented posts, the recommended size is 1080 × 1080 pixels; for landscape, 1080 × 566 pixels; and for portrait, 1080 × 1350 pixels.

LinkedIn Letterhead Size

LinkedIn blog post images with letterheads have a highly recommended size of 1200 × 627 pixels. For page covers of LinkedIn company pages, the best pixel size is 1128 × 191 pixels.

Letterhead Sizes for Print

Printing any document with letterheads is easy. You open your document creation app, go to the Print settings, connect your printer, and start printing; simple enough. The main challenge lies in setting the right size before clicking “Print.” So now let’s discuss the best letterhead sizes for printing.

US

US is the most common letterhead size used in the United States. It measures 8.5 x 11 inches and is the main standard size of letterheads.

UK

UK letterheads measure 8.27 x 11.7. The UK size is commonly used in Europe and offers slightly more space than the US letterhead size.

A4

A4 letterheads are almost the same size as UK letterheads. It’s also a standard letterhead size and a primary choice by many letterhead users.

Legal

Legal letterheads measure 8.5 x 14 inches, only three inches longer than the US size in height. This letterhead size is often used for home and office stationery.

Tabloid

Tabloid letterhead size is used for brochures, flyers, newsletters, and the like. Its length is 11 x 17 and is typically more expensive to print than other letterhead sizes.

Letter Half

Letter-half letterhead size is best for greeting cards, postcards, and invitation cards. It measures 5.5 x 8.5 inches.

Letterhead Sizes for Business

The general standard size of business and formal documents is US, which is 8.5″ × 11″. That said, letterheads for business must be usually printed in that size. A4 would also do.

Letterhead Sizes for Microsoft Word

Letterhead in Microsoft Word, you can choose any size for your letterhead documents. However, the best size is 8.5″ × 11″ (US), especially if your letterhead has a logo design.

Letterhead Sizes for Adobe Photoshop

When you create a letterhead in Adobe Photoshop, you need to change the height to 303 mm and the width to 216 mm. It’s required to print a standard A4 letterhead document. You can change the dimensions in the present details.

Letterhead Sizes for Adobe Illustrator

Letterhead in Adobe Illustrator, you can select any size to print your letterheads. However, the US size is most recommended since it’s the most commonly used size for printing standard documents.

Tabloid Letterhead Size

Tabloid letterhead size is 11″ × 17″. It’s the standard size of the letterheads of flyers, brochures, newsletters, posters, and other oversized and folded documents.

Letter-Half Letterhead Size

Letter-half letterhead size measures 5.5″ × 8.5″. That’s the letterhead size you need to print the letterheads of postcards, greeting cards, invitations, private letters, and small notepads.

Letterhead Sizes FAQs

What Size Is a Letterhead?

The two most common letterhead sizes are US and A4.

What Resolution Should a Letterhead Be?

The most common and ideal resolution of a letterhead is 2550 × 3300 pixels, which is in line with the US size.

What Are the Dimensions of a Letterhead?

The dimensions of most letterheads are 8.5″ × 11″ and 8.27″ × 11″.

What Size Is a Monarch Letterhead?

The size of a Monarch letterhead is 7.25″ × 10.5″.

What Size Should a Logo Be on a Letterhead?

The ideal size of a logo on letterhead is 300 × 120 pixels.

What Envelope Size to Use with an A4 Letterhead?

The ideal envelope size for an A4 letterhead is C4, which measures 324 mm × 229 mm.

What Is the Canadian Letterhead Size?

The Canadian letterhead size is the same as the US size which is 8.5″ × 11″.

What Font Size Should a Letterhead Be?

The ideal font sizes for letterheads are 10, 11, and 12.

What Is the Standard Size of a Header for a Letterhead?

The header height should be 1.50″ and the header width should be 8.5″.

What Size Is an A4 Letterhead?

The paper size of an A4 letterhead is 8.27″ × 11″.

What Is the Best Font Size for a Letterhead?

The best font size for a letterhead is either 10, 11, or 12.

In summary, understanding and choosing the right letterhead size is crucial for professional correspondence. Whether opting for standard sizes or custom dimensions, ensure your letterhead aligns with your brand and message. This guide has highlighted key considerations for selecting the perfect size, enabling you to make informed decisions that enhance your business communications. Remember, the right letterhead size can significantly impact the presentation and perception of your documents.