Analogously, in Korean jang (장; 張) is used to count sheets or anything that is a paper-like material, for example: 버스버스beoseubus표票pyoticket열열yeolten장張jang'sheets'버스 표 열 장버스 票 열 張beoseu pyo yeol jangbus ticket ten 'sheets'"ten bus tickets"In fact, the meanings of counter words are frequently extended in metaphorical or other image-based ways.
For instance, in addition to counting simply sheets of paper, jang in Korean can be used to refer to any number of thin, paper-like objects.
Native Korean numerals are used with most counter words, and usually count the number of an object, while Sino-Korean numerals are generally used for indicating a specific object in series, such as a specific lesson in a book, as well as monetary units and scientific measurements.
For example: 열열yeol과課gwa열 과열 課yeol gwa'ten lessons'십十sip과課gwa십 과十 課sip gwa'lesson ten'There are exceptions, such as native Korean numbers being used with 시, meaning "hour of the day".
Additionally some counters (mostly those associated with traditional units) modify the pronunciation and spelling of the numerals that precede it, most notably 6월 is 유월 and 10월 is 시월.