How to make a tallest square origami box

(page 4)

5th picture of tall square origami paper box II

05.

Apply the vertical "gate-fold" of the step #4 and then unfold.

Now, you have completed making a "4x4 matrix base" .

Prepare to apply two horizontal "valley-folds" .

6th picture of tall square origami paper box II

06.

Apply two horizontal "valley-folds" of the step #5 and then unfold.

Prepare to apply two vertical "valley-folds" and then unfold.