Here are some Korean counters. Counters are words like “piece of paper” or “year’s old” that you attach to numbers to indicate sets or numbers of items/people/animals, etc.
별 : items of clothing
대 : vehicles, cars, machinery
과 : lessons
권 : volumes of books
장 : piece of paper
마리 : animals
병 : bottles (alcohol)
잔 : glasses/cups (water or non-bottled liquid)
층 : floors
곡 : songs
마디 : words, phrases
통 : containers, buckets
사람 : people (informal)
분 : people (formal)
Of course there are more counters that I haven’t listed, but these are one of the most commonly used.
