This Halloween Greeting Card is 5" x 7" and comes with the card base and a mat. The card is compatible with the 8x12 and 12x12 mats. To assemble, cut both the card base and the inside mat. Adhere the mat to the inside front (to provide the color background for the card cuts) and then carefully fold on the score line. You can see additional images on my blog: https://jamielanedesigns.blogspot.com/2018/09/halloween-greeting-cards.html