# A1 vs A4

> French confusable word pair

## The two words

### A1
*noun · IPA \a.œ̃\ · frequency rank #17,858*
Format d'une feuille de 594,6 mm sur 840,9.

### A4
*symbol · frequency rank #18,920*
Format de papier de 210 mm × 297 mm.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/fr/vs/a1-vs-a4