This file comes with a one piece base, a decorative mat that also lines the top of the bag (folds over), and a bottom mat to hide the tabs at the bottom for a crisp clean, store bought look! The completed project is approximately 3-3/4" x 4" x 1-1/2" and the bag is compatible with both the 8x12 and 12x12 mats. https://jamielanedesigns.blogspot.com/2019/11/two-toned-gift-bag