This Organizer comes with the two side boxes, the center organizer that contains three compartments, and the organizer base that holds the three boxes neatly together. The file includes both the 12x12 one piece files as well as the 8x12 two piece files for use with the Portrait. The boxes are approximately 8" x 1-3/4" x 3-3/4" and the center box has bottom storage of 2-1/2" tall. Please see my blog for additional images and a full tutorial: http://jamielanedesigns.blogspot.com/2015/08/organizer-stand-with-three-shelves.html