In most modern legal systems, a jury usually has between 6 and 12 people, with 12 still the classic number in many criminal trials.

Quick Scoop: Typical Jury Sizes

  • In many countries, the “standard” trial jury (often called a petit jury) is 12 people, especially for serious criminal cases.
  • Some courts now use smaller juries of 6–8 people, particularly for civil cases or less serious criminal matters.
  • In the United States federal system, criminal juries are usually 12 people, while federal civil juries can be anywhere from 6 to 12.
  • Grand juries, which decide whether to issue indictments rather than guilt or innocence, are larger: commonly 16–23 people in the U.S.
  • There are a few unique systems: for example, Scottish criminal juries have 15 jurors, one of the largest standard jury sizes in the world.

So if you just need a quick rule of thumb: 12 people is the traditional size, but depending on the country, type of case (criminal vs civil), and court rules, a jury can legally be as small as 6 or as large as 23 for grand juries.

Information gathered from public forums or data available on the internet and portrayed here.