The Ultimate Guide to PDF Page Sizes (A4 vs. US Letter and More)

When you create a PDF, you're creating a digital document with a fixed layout. A key part of that layout is the page size. Choosing the wrong one can lead to printing errors, formatting issues, and an unprofessional look. Our converter offers the most common choices, and understanding them is key to a perfect conversion.

A4: The International Standard

A4 (210 x 297 mm) is the standard paper size used in almost every country outside of North America. If you are creating a document for an international audience, a business in Europe or Asia, or for most academic purposes, A4 is the safe and correct choice. It's slightly taller and narrower than its American counterpart.

US Letter: The North American Standard

US Letter (8.5 x 11 inches) is the standard paper size in the United States, Canada, and parts of Mexico and the Philippines. If you are creating a document for business, legal, or personal use primarily within North America, US Letter is the format you should use. Using A4 for a US audience can result in content being cut off when printed.

Fit: Same as Image

The 'Fit' option is unique and powerful. It tells the converter to create a PDF page that has the exact same dimensions and aspect ratio as your source image. This is the perfect choice when your goal is to preserve a photograph or a piece of artwork without adding any margins or fitting it to a standard paper size. It creates a borderless PDF that perfectly encapsulates your image.

By selecting the right page size in the options panel before converting, you ensure your final document is perfectly formatted for its intended audience and purpose.