The construction is seamless: the body and sleeves are knit separately, then the upper body is worked in a single piece, with set-in sleeves that are shaped as you go.

Yarn
Non-superwash wool yarn. Briar Rose Nate’s Yarn (100% wool, 500yds / 457m, 4.94oz / 140g) shown in MC: Old Gold, and CC: Undyed.

MC: 700[750, 800, 850, 900, 900] (950, 1000, 1000, 1050, 1100) [1150, 1200, 1250, 1300, 1300]yds / 700[750, 750, 800, 850, 900] (950, 950, 1000, 1000, 1050) [1100, 1150, 1200, 1250, 1250]m
CC: 500[550, 550, 600, 600, 650] (650, 700, 700, 750, 750) [800, 850, 850, 900, 900]yds / 450[500, 550, 550, 600, 600] (650, 650, 700, 750, 750) [800, 800, 800, 850, 850]m

Gauge
24 sts and 28 rnds = 4” / 10 cm in stranded colourwork patt worked in the rnd with larger needle, after blocking.

Sizes
Finished chest circumference: 30[32, 34, 36, 38, 40] (42, 44, 46, 48, 50) [52, 54, 56, 58, 60]“ / 76[81.5, 86.5, 91.5, 96.5, 101.5] (106.5, 112, 117, 122, 127) [132, 137, 142, 147.5, 152.5]cm.

Shown in size 30” with zero ease.

Helpful links
Technique Thursday - Long-tail tubular cast on
Choosing colours, a guest post from Felicity Ford
Technique Thursday - Colour dominance
Technique Thursday - Bust darts in sweaters with all over stitch patterns
Technique Thursday - Joining the sleeves and body on a seamless bottom up sweater