Twelve is a number that represents:

• Hours: There are 12 hours on a clock.
• Months: There are 12 months in a year.
• Signs of the Zodiac: There are 12 astrological signs.
• Apostles: Jesus had 12 apostles.
• Labors of Hercules: Heracles performed 12 labors.
• Jurors: A grand jury typically consists of 12 people.
• Eggs in a carton: A standard egg carton holds 12 eggs.
• In Christianity: The number 12 symbolizes the authority of the Church (12 apostles) and the completeness of God's plan (12 tribes of Israel).
• In mathematics: 12 is a highly composite number with 16 divisors.
• In music: The 12 notes in the chromatic scale.
• In sports: The number of runs scored in a home run in baseball.
• In the Bible: There are 12 sons of Jacob and 12 elders of Israel in Revelation.