The pattern uses the Fair Isle technique for working the colourwork rows. You should strand the yarn not in use loosely behind the stitches being worked. It is advisable not to carry the stranded yarns over more than three stitches at a time, but weave them under and over the colour you are working. Spread the worked stitches out to their correct width after each colour change to maintain an even tension.
This pattern is designed for five men’s sizes, from S (to fit chest 102cm) to XXL (to fit chest 122cm).