Rule 220 - Jury Size in Civil Trials(a) Except as provided in subdivision (b), juries in civil cases may, at the discretion of the trial judge, consist of as few as eight members. Trials in such cases shall continue so long as at least six jurors remain in service. If the number of jurors falls below six, a mistrial shall be declared upon prompt application therefor by any party then of record.(b) When a jury trial has been demanded pursuant to Pa. R.C.P. 1007.1, a trial by a jury consisting of twelve members may be had if written demand therefor is filed with the court on any pleading or as a part of the original pre-trial statement. Such demand may appear on the pre-trial memorandum form under the heading "miscellaneous."(c) Regardless of jury size, each party shall be entitled as a matter of right to four peremptory challenges, except that in cases involving multiple plaintiffs and/or multiple defendants, the trial court shall, in its discretion, determine the number of peremptory challenges available to each of the parties then of record.Amended effective 1/1/2020; amended effective 7/1/2023.