In case anyone wants to make different sizes, here is the formula: Divide your PAPER SIZE by 2.83 to determine FINAL length/width of BOX. Conversely, you can Multiply DESIRED BOX SIZE by 2.83 to determine size of PAPER you will need. PS the height of your box will be 1/2 the length/width. Here's an example: an 8.5" square of paper will yield a box that is 3" square and 1.5" high. (8.5/2.83 = 3, then 3/2 = 1.5)
