I used 4mm needles, it is an easy 1x1 ribbing pattern, 2 rows for each colour. I used a whole skein of the Sirdar Denim Tweed DK (Shade 0644) and (probably) half a skein of the Opal Hundertwasser (sock) yarn. The scarf is not really wide (35 stitches wide) but if I were to make one for myself I would probably make it wider.
I really like the colour effect, and it is a great project to take in the car (until we got lost and I had to focus on reading the map). But it is a bit boring.
Did you notice my favourite mug in the background (made by yours truly), very wonky but I love it! Off to Zurich in a couple of hours, so better get packing...