You need a pieces of cardstock that measures 12 x 8 1/2, your paper
trimmer,
bone folder, and adhesive.
On the 12" side you're going to score at 2 1/2", 3 1/4",
7 5/8", 8 7/16"
On the 8 1/2" side you're going to score at 5/8", 1 3/8",
7 1/8", 7 7/8".
Now you're going to cut away the parts shown below.
Crease all your score lines.
You need to add adhesive to the small end flap.
Now your box is complete. Decorate and enjoy!