Letter-size names a sheet of paper: 8½ inches wide and 11 inches long (about 216 × 279 mm). It is the everyday printer paper in the United States — the size people there mean when they say “a letter” as stationery.

Letter-size names指的是 a sheet of paper一種紙的規格： 8½ inches wide寬8½吋、 11 inches long長11吋（ about 216 × 279 mm大約216×279公釐）。 It is它是 in the United States美國 the everyday printer paper日常用的印表機用紙—— people there那裡的人 when they say “a letter” as stationery說「一張信紙」時 mean指的 the size就是這個尺寸。

Taiwan, and most of the world, uses A4 instead. A4 is a little narrower and a little longer. If you print a US letter-size file on A4, the edges may clip or the margins look wrong; the other way around, you get extra space.

Taiwan台灣， and most of the world和世界上大部分地方， uses A4 instead用的是 A4。 A4 is a little narrowerA4 窄一點， and a little longer也長一點。 If如果 a US letter-size file把美式 letter 尺寸的檔案 you print on A4印在 A4 上， the edges may clip邊緣可能被裁掉， or the margins look wrong或版邊看起來怪怪的； the other way around反過來印， you get extra space就會多出空白。

You will see letter-size on American printers, in office software (often the default when the program is set to US), and on envelopes and folders sold for that market. It is a practical office word, not a poetic one. Legal-size is the longer American cousin (8½ × 14 inches).

You will see letter-size你會在這些地方看到 letter-size： on American printers美國的印表機、 in office software辦公軟體（ often the default when the program is set to US設成美國時常是預設值）， and on還有 sold for that market賣給那個市場的 envelopes and folders信封和文件夾上。 It is a practical office word它是個實用的辦公室字眼， not a poetic one不是詩意的字。 Legal-size is是它 the longer American cousin比較長的美國表親（ 8½ × 14 inches8½×14吋）。