I used poster board but you can use heavy wieght cardstock.
Since I used white, I created my own pattern by first Sponging a little color
then by stamping with a background stamp.
When I was finished with that I sponged with Chocolate ink
Then cut the corners off as shown
then cut along the score line torwards the middle as shown.
The base is complete.
The top is created in the same manner with these measurments:
Cardstock~ 9 3/8" x 5 3/8"
Score at 1 1/4" on all sides.
Sorry that this photo doesn't show the lid finished.
To make the dividers for the inside,