A-series reference
A4 paper size (210 × 297 mm → 8.27 × 11.69 in)
A4 is the most common ISO paper size. Below you will find exact inch conversions, aspect ratio notes, printable area guidance, and tips for sending A4 files to US Letter printers without losing content.
210 × 297 mm8.27 × 11.69 in1:sqrt(2) ratio
Dimensions
- Millimeters: 210 mm × 297 mm
- Inches: 8.27 in × 11.69 in
Print and export tips
On US Letter printers, choose Fit to printable area or scale near 97 percent. Keep 3–5 mm bleed or safety on every edge, and add inner margins if you plan duplex binding.
Common uses
Office and school
Default size for reports, worksheets, and documentation in most countries.
Design and print
Brochures, resumes, menus, and handouts; export at 300 dpi for clean edges.
A4 vs Letter
Letter is wider and shorter, so keep footer text away from the edge when printing cross-region.