TwelveTwelve (12) is the natural number following eleven and preceding thirteen.
The number twelve is often used as a sales unit in trade, and is often referred to as a dozen. Twelve dozen are known as a gross. (Note that there are thirteen loaves in a baker's dozen.) The duodecimal system, which is the use of 12 as a division factor for many historical weights and measures, including hours, probably originates from Mesopotamia. See also: base 12.
In base thirteen and higher bases (such as hexadecimal), twelve is represented as C.
There are twelve months in a year.
There are normally twelve pairs of ribs in the human body.
The song Twelve Days of Christmas came from the traditional practice of extending Yuletide celebrations over twelve days.
See also: ten, eleven, twelve, thirteen, fourteen integer, list of numbers.
This article is about the number. For the year AD 12, see 12.