The file contains the shelf base, two mats, and is compatible with both the 8x12 and 12x12 mats.  The finished project is approximately 5-1/2" x 4" x 1-1/2" with the top shelf approximately 3-1/2" and the bottom shelf approximately 2". This project is perfect for holding small crafting supplies, embellishments, sorting screws/nails for Dad, and more! https://jamielanedesigns.blogspot.com/2019/05/free-with-purchase-coming-soon.html