Real estate newsletters are based on 11" x 17" paper folded in half, with each sheet 
producing four pages. Pages are increased in multiples of four to a maximum of 32 pages:
One 11" x 17" paper folded in half
creating two double sided pages
Two 11" x 17" pieces of paper folded
in half creating four double sided pages
Three 11" x 17" pieces of paper folded
in half creating six double sided pages