This box is approximately 5" x 6" x 2-1/2" and the lid sits inside the box. The file comes with the base box pieces (4), the lid pieces (4), and a decorative scallop heart. The file is compatible with both the 8x12 and 12x12 mats. You can find additional images and a full tutorial on my blog: http://jamielanedesigns.blogspot.com/2014/02/feeling-love.html