Number + 号/Generic Measure Noun
In Chinese, certain nouns such as 号 (hào, "number") can function as measure words or classifiers in specific contexts. These generic noun-measure words help identify or enumerate items like dates, sizes, or assigned numbers. For example, 十八号 means "the 18th" or "number 18."
我的座位是十二号,在第三排。
Wǒ de zuòwèi shì shí'èr hào, zài dì sān pái.
My seat is number twelve, in the third row.
今天是五月十八号,她的生日。
Jīntiān shì wǔ yuè shíbā hào, tā de shēngrì.
Today is May 18th, her birthday.
请给我拿一双四十号的鞋试试。
Qǐng gěi wǒ ná yī shuāng sìshí hào de xié shìshi.
Please get me a pair of shoes in size forty to try on.