This is one of my all time favorite sock knitting bags. I had just a few scraps of these fabrics left, so I pieced them together. I make mine from approximately 18" x 11" instead of her measurements- this works out best for my socks.

Pattern:

http://daisyjanie.typepad.com/daisyjanie/2010/12/how-to-fabric-produce-bag-free-pdf-pattern.html