You can make a scarf 6" wide and 80" long with one skein of Ballet yarn. The pattern, shown here, is free! There are 350 yards of Alpaca and Tencel goodness in a skein of this hand-dyed yarn from Fiesta. (50% superfine alpaca, 50% tencel.) Each skein is only $25.50.
My scarf is 50" long, and I used about 60% of the skein. This bright and pleasant young man volunteered to model for me.
Here's a sample of the colors available. All of them are lovely!