Falling autumn leaves on a Welsh hillside was the inspiration for this jumper.
I used Sirri 2-ply to create this design, a pure wool yarn that lends itself really well to steeking secured by crochet, but you can substitute another yarn of your choice to give the same gauge (19 sts for 10 cm on 6 mm needles in colourwork st st) - perhaps Snaeldan 3-ply or Navia trio. (If your yarn choice does not lend itself to steeking in this way, you could use a sewing machine to secure the steeks, or work back and forth from the armholes.)
Three sizes of garment chest measurements are given: 87 (95) 104 cm, using 4 (4) 5 skeins of Sirri 2-ply for the background colour, and one for each of the contrasts.
See also the Trelleck hat and mittens.