Number + 英寸
英寸 (yīngcùn) is a unit of measurement meaning "inch," used when describing dimensions in the imperial system. It is placed after a number to indicate size, commonly for screens, displays, and physical dimensions. It literally combines 英 (English) and 寸 (a traditional Chinese unit of length).
我新买了一台二十七英寸的显示器。
wǒ xīn mǎi le yī tái èrshíqī yīngcùn de xiǎnshìqì.
I just bought a new twenty-seven-inch monitor.
这部手机的屏幕有六点七英寸。
zhè bù shǒujī de píngmù yǒu liù diǎn qī yīngcùn.
This phone's screen is six point seven inches.
那台电视是五十五英寸的,放在客厅刚好。
nà tái diànshì shì wǔshíwǔ yīngcùn de, fàng zài kètīng gānghǎo.
That TV is fifty-five inches — it fits perfectly in the living room.