Here is the perfect Fair Isle neckwarmer to keep you cosy in this winter.
Any DK lightweight wool works perfectly for this project.
The neckwarmer comes in three sizes:

Small, circumference 45cm, you will need about 110 meters of yarn
Medium, circumference 55cm, you will need about 160 meters of yarn
Large, circumference 65 cm, you will need about 200 meters of yarn

The sample is shown in small.

The necesarry skills are, knitting in the round, reading a chart and stranded colourwork.