I made this shawl in about 2 days from the idea on this Blog (sorry in Dutch). It's basically done in Granny Squares and then finishing rows around. The special thing is the twist in the shawl when you put it together. It makes it very nice to wear because it always hangs right. Also great when you want to make a second loop around your neck.
I only used 12 Granny Squares to make the initial circle but it might have been better to start with at least one more because it's a little tight if I want to do the double loop around my head. As soon as it's over my head it's fine and actually nice and close for warmth.