This fold over heart box is approximately 4-1/2" x 1" x 2-3/4" and is compatible with both the 8x12 and 12x12 mats. The file comes with the one piece box base, the wrap, and heart. This is perfect for classroom treats or party favors as they go together quickly! Fill with candies, gum, gift cards, and more! You can find more images and a tutorial on my blog! https://jamielanedesigns.blogspot.com/2019/01/valentine-flip-cards-and-fold-over-boxes.html