This wallet is approximately 10-1/4" x 3" open and 4" x 3" x 1/8" when closed and it can store several bills inside and has a flap that tucks inside a slot to close. The file is compatible with the 8x12 and 12x12 mats. You can find additional images and a full tutorial on my blog: http://jamielanedesigns.blogspot.com/2013/10/who-wouldnt-love-cash.html