You'll need two pieces of paper measuring 6"x6".
you first score the bottom piece by placing the lid piece in the side of your scoring board as a shim. then score at 1 and 5 inches, turn and score again at 1"and 5".
Burnish and notch, then put it together.
I used the other bit of paper as my shim, but a narrower piece would be easier, as long as the thickness of the card is the same.
For the lid you also score at 1"and 5"but without the shim.
I like to fold the lid around the base/bottom, but it should fit snugly no matter.