Step 4Fold in corners
iImage Information

Fold in all corners, not all the way to the center but a little ways leaving some space as per picture. The two spaces on each side of the middle need to be the same or at least roughly the same (there is some leeway here). Here the text comes in handy for keeping the top/side of the folds straight in relation to the paper and as a loose guide to distance. Leaving larger spaces makes the box shallower but sturdier and vice versa, deeper but flimsier for smaller ones. Don't leave more then half of the distance between middle and side or you'll be in trouble in a few steps.