Each Slimline Card is 3-1/2" x 8-1/2" and comes with the card base, front mat, and the pop-up insert! You can use these cards vertically or horizontally. Due to the size of the cards as they come they are recommended for 12x12+ cutting mats. If you are using a Portrait (8' x 12") cutting area you will have to reduce the size of the card to cut. Look for the coordinating Slimline Envelope! See more on my blog:

Slimline Cards