This bag is approximately 5-3/4” x 2-3/4” x 2” and is compatible with the 8x12 and 12x12 mats. The file comes with the bag base that includes holes for a ribbon handle, the Birthday panel, and a background panel to change the sentiment letter coloring. You can find additional images and a full tutorial on my blog: http://jamielanedesigns.blogspot.com/2014/01/birthday-bag-and-love-bag.html