The cun (Chinese: 寸; pinyin: cùn; Wade-Giles: ts'un) is a traditional Chinese unit of length. Pinyin, more formally Hanyu pinyin, is the most common Standard Mandarin Romanization system in use Wade-Giles (ˌweɪdˈʤaɪlz) sometimes abbreviated Wade, is a Romanization system (phonetic notation and Transcription) for the Mandarin Chinese units of measurement ( are the customary and traditional units of measure used in the People's Republic of China. Its traditional measure is the width of a person's thumb at the knuckle, whereas the width of the two forefingers denotes 1. 5 cun and the width of all fingers side-by-side is three cuns. In this sense it continues to be used to chart acupuncture points on the human body in various uses of traditional Chinese medicine. Acupuncture points ( also called acupoints ( or Japanese: つぼ tsubo) are locations on the body that are the focus of Acupuncture, Acupressure Traditional Chinese medicine (also known as TCM,) includes a range of traditional medical practices originating in China.
The cun was part of a larger system, and represented one-tenth of a chi (Chinese foot). In time the lengths were standardized, and in Hong Kong, using the traditional standard, it measures ~3. 715 cm (~1. 463 in). In the twentieth century in the Republic of China, the lengths were standardized to fit with the metric system, and in current usage in China and Taiwan it measures 31⁄3 cm (~1. REPUBLIC OF CHINA ARTICLE GUIDELINES 312 in).
In Japan, the corresponding unit (the sun) was standardized at 1000⁄33 mm (~3. is the traditional Japanese system of measurement. The name shakkanhō originates from the name of two of the units, the Shaku 030 cm, ~1. 193 in, or ~0. 09942 ft).
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