Cimorene

The blanket took 12 skeins of Katri (http://www.ravelry.com/yarns/library/novita-katri) and ended up only being 3x4 feet, but that was probably because I was using a fairly thick yarn and a thick texture. With a skinnier yarn, larger hook and flatter pattern, you could probably get a pretty large blanket out of 12 skeins. I chose that yarn because I knew I'd have to get a bunch of it -- it was acrylic and therefore cheaper than any of the other stuff -- EUR 2.20 a skein, according to my notes. Very reasonable final cost, I think.