Make a box out of a greeting card!

Step 3 Mark fold lines.

 We'll need the back half of the card for this. Before you mark any lines, cut a very small amount (a couple of millimeters) off one end. Done that? Good. Now make two lines along the long ends 2 cm from the edge (see second picture). Okay, now make one line 2 cm from the edge on one of the short ends (see third picture) then make a second one 2 cm down from the first, (again, see third picture) do this on both ends.