A4 vs Letter

A4 is 5.9 mm narrower and 17.6 mm taller than US Letter.

A4210 × 297 mm≈ 8.27 × 11.69 in
US Letter215.9 × 279.4 mm8.5 × 11 in

Compare the outlines

A4 and Letter paper outlines at a shared scale
Centered on a shared scale. Hatching marks where the first sheet extends past the second.
A4210 × 297 mm
Letter215.9 × 279.4 mm
A4 relative to LetterWidth 5.9 mm narrowerHeight 17.6 mm taller

Check your printed size

Print the file matching your paper at Actual size / 100%. Measure the 100 mm rulers and the 1-inch square. Every grid cell is 10 × 10 mm.

Embed this comparison chart

Use the static diagram in a guide or document. The HTML includes a visible source credit.

SVGPNG
Preview chart and codeA4 and US Letter paper outlines at the same scale with their dimensions
<figure>
  <img src="https://papersizedb.com/charts/a4-vs-letter.png"
       alt="A4 and US Letter paper outlines at the same scale with their dimensions"
       width="1200" height="630"
       style="max-width:100%;height:auto">
  <figcaption>Source: <a href="https://papersizedb.com/a4-vs-letter" rel="nofollow">PaperSizeDB</a></figcaption>
</figure>