I received a gift card in a box like this a couple of years ago. It was either from Bon Ton or Macey's. I liked the box so much I took it apart and made a template I could trace and reuse. This was before I even knew what a "cricut" was! I finally got around to making a ds cut file for it. (all george) The download link is at the bottom of this post.
Here is a picture of my original template, done the old-fashioned way!
This is the cricut cut. The black lines are the score lines(included in the file) the red lines are where you need to add adhesive.
This is how it looks with one side adhered.
This is how it should look with both sides adhered.