It is very important to understand and remember that all facial features we draw relative to the midline ( from bend), and not from the edge of the sheet.
Without straightening the crease line of the eyes cut out drawn half. And then unfold.
Now we’ll draw the facial features.I won’t give you the exact dimensions because each may customize the mask to his face.
Cut on the drawn lines.
And draw another cutting line on the chin:
Now I will show you how far it is necessary to glue the incisions tucks.