Begin by cutting out a piece of fabric that is 64 inches Long and 34 Inches with.
With the ride sides facing each other sew the 64 inch side together to make a large circle.
To clean up the hem you just sewed, Fold the part you just sewed twice and iron.
Sew this fold to the fabric.
Do this to the top and bottom of the scarf also, so you dont have any raw edges showing.
You are finished!
See photos and further step by step instructions here: http://korrinewojcik.blogspot.com/2011/09/over-sized-scarf-tutorial.html