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What are the ancient units of length? The ancient units of length were elbow, tigers mouth, and palm. In ancient times, the length of a persons body was often used as a basis. This was true in the Middle East, China, and globally. The Analects of Confucius states: "A cloth finger knows the inch, a cloth hand knows the ruler, and a comfortable elbow knows the search." A person is one zhang tall, hence the name "husband". The Israeli elbow is a physical unit. Cubit, also known as wrist ruler, is an ancient Egyptian or Israeli unit of length that measures approximately 18 to 22 inches from the elbow to the middle finger. 1 inch is approximately 2.54 centimeters, and after changing units, "1 elbow" is approximately 46-56 centimeters. Indeed, the length unit of the wrist ruler may vary in different regions, for example, the scale may differ between tall white people and relatively short yellow people. This may be one of the reasons for the change. Very likely: Israels "1 elbow"=(Warring States period) 2 feet=46 centimeters. However, due to the age and uncertainty of the elbow itself, it is no longer possible to obtain accurate data. Later on, you will find that the most common way of measuring units in ancient times was to use a binary system. Some people also believe that "1 elbow" is equal to "52 centimeters". It is still a question whether the "elbow" unit underwent significant changes in ancient times. There is also a unit developed from the human body in the Bible: the "tigers mouth", which is English for "span". This is an ancient concept that is also used by Chinese people: "one scoop (za)" - the maximum distance between the tip of the thumb and the middle fingertip when the palm is fully opened. In official use, "tiger mouth" is a measurement unit with specific fixed dimensions: 1 span=23 centimeters. Chinas "1 foot (Warring States period)" is exactly "23 centimeters"! So: Israels "1 tigers mouth" (1 span)=Chinas Warring States period 1 foot. In other words: 1 elbow for Israel=2 tiger mouths=2 feet for Warring States. Is it accidental that the above Chinese units of length are equivalent to ancient Israeli units? Lets continue. In ancient Middle Eastern regions such as Egypt and Israel, another smaller unit of length was hand width , approximately 7.7 centimeters. Chinas 1 (Shang Dynasty Hu Dighua) ruler is exactly 15.8 centimeters, and we have every reason to suspect that 2 (Israel) palm width=1 (Shang Dynasty) ruler. The current metric system comes from France, where one meter is equal to the distance that light travels in 1/2458 second of vacuum time, equivalent to defining the speed of light as 2458 meters per second. Originating from France in 1790, French scientists such as Bald suggested using "one hundred thousandth of the length from the North Pole to the equator passing through the Paris Meridian as a unit". The reason why it is called "meter" is because of the meter. The unit of length in the UK is foot , which is obviously originally a natural scale. Inches are also a "natural" unit of measurement: derived from the length of three barley grains, approximately 2.54 centimeters. But 1 foot is equivalent to 30.48 centimeters. Basically, its an integer conversion. Three feet in China is exactly equal to one meter. There is also a length unit called "yard" in Britain, where 1 yard equals 0.914 meters, which is equivalent to "2 steps" in the Qing Dynasty of China. The length units of China and the UK will change over time,

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