Fair Isle (/fɛəraɪ̯l/) is a traditional knitting technique used to create patterns with multiple colours. It is named after Fair Isle, one of the Shetland islands. Fair Isle knitting gained considerable popularity when the Prince of Wales (later Edward VIII) wore Fair Isle jumpers in public in 1921. Traditional Fair Isle patterns have a limited palette of five or so colours, use only two colours per row, are worked in the round, and limit the length of a run of any particular colour. Other techniques for knitting in colour include intarsia, slip-stitch colour (also known as mosaic knitting).