This box covers rectangle tissue boxes such as Puffs or Kleenex. The box assembled is approximately 3-1/2” x 9” x 5” and has the box base (does not have a bottom) and the lid plus the pieces shown. All pieces are compatible with both the 8x12 and 12x12 mats. You can find additional images and a full tutorial on my blog: http://jamielanedesigns.blogspot.com/2014/08/rectangle-tissue-boxes.html