A4 is the everyday paper size in Taiwan, Europe, and much of Asia. One sheet is 210 millimetres by 297 millimetres. Almost every school printer, homework page, and office letter here is A4.

A4 is the everyday paper size in Taiwan, Europe, and much of AsiaA4 是台灣、歐洲和亞洲大部分地方日常使用的紙張尺寸。 One sheet is 210 millimetres by 297 millimetres一張是210公釐乘以297公釐。 Almost every school printer, homework page, and office letter here is A4這裡幾乎每台學校印表機、每份作業紙、每封辦公室信件都是A4。

It is the same international A-series as A3: if you cut an A3 sheet in half across the middle, you get two A4 sheets.

It is the same international A-series as A3它跟A3屬於同一套國際A系列尺寸: if you cut an A3 sheet in half across the middle如果把一張A3從中間對切, you get two A4 sheets就會得到兩張A4。

In the United States the common page is a little different (called letter size), so an American “letter” page is not quite A4 — a little shorter and a little wider.

In the United States在美國 the common page is a little different常用的紙張有點不一樣 (called letter size)（叫 letter size）, so所以 an American “letter” page is not quite A4美國的 "letter" 紙不完全等於A4 — a little shorter and a little wider稍微短一點、寬一點。

When someone says “print it on A4,” they mean this standard page, not thick paper or special paper. Though actually, people sometimes say “an A4” to mean one sheet, the way we say 「一張A4」.

When someone says “print it on A4,”當有人說 "print it on A4," they mean this standard page, not thick paper or special paper他們指的是這種標準紙，不是厚紙或特殊紙。 Though actually不過, people sometimes say “an A4” to mean one sheet有時候人們會說 "an A4" 來指一張, the way we say 「一張A4」就像我們說「一張A4」一樣。