Compare the sheet sizes

ISO 216 A4 paper

Width
210 mm
Height
297 mm
Thickness
0.1 mm · Reference value

US Letter paper

Width
215.9 mm
Height
279.4 mm
Thickness
0.1 mm · Reference value
A4 paper vs US-LETTER paperSIZE OF THINGSSame scale · not actual screen sizeA4 paper vs US-LETTER paper210 mm297 mmA4 paperThickness 0.1 mm · Reference value215.9 mm279.4 mmUS-LETTER paperThickness 0.1 mm · Reference valueDashed bounds show dimensions. Photos illustrate appearance, not an exact outline.
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These sheets look similar but are not interchangeable sizes. The table describes the whole sheet, not the printable area supported by a particular printer. The comparison tool shows their width and height at the same scale.

Why a print can shrink or be cropped

A mismatch between the document page size, the print dialog and the paper in the tray can cause cropping or automatic scaling. Align all three settings and inspect the preview. If a template must print at its intended size, check any “fit to page” option and measure a reference length on the printed sheet.

Choosing a folder

Check the paper size a folder can hold, rather than its external dimensions. A flat comparison cannot establish whether a thick stack or binder fits. Paper thickness varies with material and weight; the unverified thickness reference on this site is not a fixed thickness specified by the paper-size standard.