The most common printer paper sizes are US Letter and A4 , and they’re slightly different in their dimensions.

Quick Scoop

  • US Letter (standard in the U.S. and Canada) :
    • 8.5 × 11 inches
    • 216 × 279 millimeters
  • A4 (standard in most of the world) :
    • 210 × 297 millimeters
    • 8.27 × 11.69 inches

So, if someone asks “what are the dimensions of printer paper?” they usually mean either 8.5″ × 11″ (Letter) or 210 mm × 297 mm (A4) , depending on the country.

Key Sizes At a Glance

Here’s a compact view of the main everyday printer papers:

Common Name Region Dimensions (inches) Dimensions (mm)
Letter US/Canada 8.5 × 11 216 × 279
Legal US/Canada 8.5 × 14 216 × 356
Tabloid / Ledger US/Canada 11 × 17 279 × 432
A4 International (ISO) 8.27 × 11.69 210 × 297
A3 International (ISO) 11.69 × 16.54 297 × 420
A5 International (ISO) 5.83 × 8.27 148 × 210
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One quick example

  • Printing in the US on a home or office printer: your default is almost certainly Letter 8.5″ × 11″.
  • Printing in Europe or most other countries : the default is A4 210 × 297 mm.

TL;DR:

  • US standard printer paper: Letter 8.5″ × 11″ (216 × 279 mm).
  • International standard printer paper: A4 210 × 297 mm (8.27″ × 11.69″).

Information gathered from public forums or data available on the internet and portrayed here.