This box covers square tissue boxes such as Puffs or Kleenex. The box assembled is approximately 5” x 4-3/8” x 4-3/8” 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/square-tissue-boxes.html