M (Medium) is OK.

中号的就可以了。

youdao

And people would well I'm kind of an average person--I'll have medium.

大部分人都是中间派,会要个中包的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Medium-size M-class flares can cause brief radio blackouts in the polar regions and occasional minor radiation storms.

MSN: Big sunspot unleashes an intense solar flare

Griffith pulled it off seamlessly: As you watch him, you understand how the smiling, aw-shucks, I'm-just-a-country-boy Lonesome Rhodes could cynically use the then-new medium of national television to become as powerful as the president, while privately holding his viewers in utter contempt.

CNN: Andy Griffith's crowning achievement

Intersessional Financial Advisory Group and Working Group on Medium-term Strategy, chaired by Professor Peter M.

UNESCO: Social and Human Sciences