For the Afro-Asiatic language, see Dorze language. Group of twelve” redirects here. This article has an unclear citation style. The references used may be made clearer with a different or the devil’s dozen pdf style of citation, footnoting, or external linking.
The dozen may be one of the earliest primitive groupings, perhaps because there are approximately a dozen cycles of the moon or months in a cycle of the sun or year. Twelve is convenient because it has the most divisors of any number under 18. This could come from counting on one’s fingers by counting each finger bone with one’s thumb. Using this method, one hand can count to twelve, and two hands can count to 144.
A great hundred, also known as a small gross, is 120 or ten dozen. A baker’s dozen, also known as a big or long dozen, is 13.