page_title: Cun (unit)
hierarchical_section_title: Cun (unit)
caption_attribution_description: 中文: 木尺，西汉，长23.2厘米，宽1.6厘米，厚0.4厘米，1973年金塔县汉代肩水金关遗址出土，现藏于甘肃省博物馆 English: A wooden ruler of the Western Han Dynasty (206 BCE – 9 CE), its length is 1 chi(Chinese foot),i.e. 23.2cm. unearthed at Jinguan Pass Site in Jinta County, photographed at Gansu Provincial Museum
context_page_description: Cun, often glossed as the Chinese inch, is a traditional Chinese unit of length. 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 four 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.
  The cun was part of a larger system, and represented one-tenth of a chi. In time the lengths were standardized, although to different values in different jurisdictions.
  In Hong Kong, using the traditional standard, it measures ~3.715 cm and is written "tsun". In the twentieth century in the Republic of China, the lengths were standardized to fit with the metric system, and in current usage in People's Republic of China and Taiwan it measures ​3 ¹⁄₃ cm.
  In Japan, the corresponding unit, sun, was standardized at ​¹⁰⁰⁰⁄₃₃ mm.
context_section_description: Cun (Chinese: 寸; pinyin: cùn; Wade–Giles: ts'un; Japanese: sun; Korean: chon), often glossed as the Chinese inch, is a traditional Chinese unit of length. 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 four fingers (except the thumb) 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.
  The cun was part of a larger system, and represented one-tenth of a chi ("Chinese foot"). In time the lengths were standardized, although to different values in different jurisdictions. (See  chi (unit) for details.)
  In Hong Kong, using the traditional standard, it measures ~3.715 cm (~1.463 in) and is written "tsun". In the twentieth century in the Republic of China, the lengths were standardized to fit with the metric system, and in current usage in People's Republic of China and Taiwan it measures ​3 ¹⁄₃ cm (~1.312 in).
  In Japan, the corresponding unit, sun (寸（すん）), was standardized at ​¹⁰⁰⁰⁄₃₃ mm (~3.030 cm, ~1.193 in, or ~0.09942 ft).
caption: Wooden ruler of the western Han dynasty, unearthed at Jinguan Pass Site in Jinta County
exif: {"Image ImageDescription": "", "Image Make": "SONY", "Image Model": "DSC-HX30", "Image XResolution": "350", "Image YResolution": "350", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "www.meitu.com", "Image DateTime": "2015:03:13 10:28:00", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "270", "Image PrintIM": "[80, 114, 105, 110, 116, 73, 77, 0, 48, 51, 48, 48, 0, 0, 2, 0, 2, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail ImageDescription": "", "Thumbnail Make": "SONY", "Thumbnail Model": "DSC-HX30", "Thumbnail Orientation": "Horizontal (normal)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail Software": "DSC-HX30 v1.02", "Thumbnail DateTime": "2015:03:13 10:28:00", "Thumbnail JPEGInterchangeFormat": "38972", "Thumbnail JPEGInterchangeFormatLength": "7100", "Thumbnail YCbCrPositioning": "Co-sited", "EXIF ExposureTime": "1/15", "EXIF FNumber": "4", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "800", "EXIF SensitivityType": "Recommended Exposure Index", "EXIF RecommendedExposureIndex": "800", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2015:03:13 10:28:00", "EXIF DateTimeDigitized": "2015:03:13 10:28:00", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "1", "EXIF BrightnessValue": "81/640", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "4", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "159/20", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "4896", "EXIF ExifImageLength": "3672", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "38664", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF SceneCaptureType": "Standard", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF LensSpecification": "[89/20, 89, 16/5, 29/5]"}