Step 1: With a piece of 8 1/2"x 11" peice of cardstock, score all sides at 2 3/4". Then go back and score at 1/2" all on sides. (SEE first picture with blue and red marker lines-these are ONLY to show you what it should look like).
Step 2: Cut away the corners on all sides (see next two pictures for referring too)
Step 3: Cut into the the long sides of cardstock to make flaps (see picture)
Step 4: Add Designer paper where I have shown.
Step 5: Add adhesive to outside flaps and fold in to the middle flap and finish box.