And a class with many students "a big/large class" ?
A class with a few students can be called "a small class" ? And a class with many students "a big/large class" ?
You can not think of large or big which are opposite of small. When small is used to describe the size of a class with a few students, it is better to link size with small with a hyphen to make one word adjective; as:
A Small-size class with fewer than 10 students.
(Not a teacher)
To my ear, "a small class" and "a big class" fit best, and are what I use/hear normally. "A large class" would be fine too.
I don't really understand the need for 'small-size'. What else would the 'small' be referring to apart from the size?
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