I couldn’t find a really fat yarn, so I used something similar to a 10 or 12ply and doubled up on the yarn. I’m not quite sure, because it didn’t say on the tag.

The yarn I used can be found here:
http://www.gjestal.no/index.php?option=com_content&vi...

I used 6 balls of 100g yarn of 80m. If you can find a fatter yarn, then the meterage would be halved.

I used a 15mm needles and it was perfect for the double up.

This is not a pure infinity scarf as I knitted it with a start and an end and simply connected the ends.

If you feel that this is a tad long, which it might be, feel free to stop knitting earlier (by say using 5 balls instead of 6 balls of yarn) and connect it.