This Haunted House Gift Box is compatible with both the 8x12 and 12x12 mats! The box is approximately 7-3/4" x 7-3/4" (almost 9" wide with porch edges) x 1-7/8". The file comes with the box base (you will need to cut two), the solid haunted house with porch for the front of the box, the solid haunted house backing for the backside of the box, the inside mat for window color, the haunted house detail pieces including the spider and boards for windows. This box can be used as a gift box or you can set it out for home decor! You can find additional images and a full tutorial on my blog: http://jamielanedesigns.blogspot.com/2015/08/haunted-house-gift-box.html