Appellate court briefs shall be prepared as provided in Rule 84.06.
Petitions, motions, transcripts and legal files shall comply with Rule 84.03.
All pleadings and other papers, except exhibits, offered for filing in any court and all forms used in any court, including opinions, shall be on paper of a size not larger than 8 1/2 X 11 inches.
An exhibit may be on paper larger than size 8 1/2 X 11 inches.
The use of recycled paper is acceptable and encouraged.
Mo. R. Civ. P. 41.07