Here is my quick and easy Harry Potter scarf! It is knitted in simple rib stitch (k1,p1) to make it double sided.
Please let me know if you have any suggestions for altering the pattern. The finish scarf according to the recommended number of stitches and rows are 2 meters, excluding the tassels. Feel free to alter it any way you like to make it wider or longer.

http://linneea.wordpress.com/2014/01/28/harry-potter-scarf/