Mo. Rev. Stat. § 543.210
Current with changes from the 2024 Legislative Session
If the case is thereafter tried before an associate circuit judge, the jury shall be composed of twelve persons, unless a less number shall be agreed upon, but not less than six. The selection of the jury and the practice and procedure relative to the jury in a case tried before an associate circuit judge shall be the same as in a case tried before a circuit judge except as otherwise provided herein.
§ 543.210, RSMo
Effective 1/2/1979