You will need a cable needle.

You will also need a circular needle size US 3 (3.25 mm) no longer than 16” (40 cm) for finishing.

Finished measurements:
Chest circumference: 36( 40.25, 44.25, 47.75, 52, 55.75, 59.75, 64)“ 91.5( 102, 112.5, 121.5, 132, 141.5, 152, 162.5) cm
Finished length: 26( 26.75, 27.5, 28.25, 29.25, 30, 30.75, 31.5)” 66( 68, 70, 72, 74, 76, 78, 80) cm
Sleeve seam: 18.5( 19.25, 20, 20.5, 20.75, 20.75, 21.25, 21.25)“ 47( 49, 51, 52, 53, 53, 54, 54) cm

Yarn used:
Rowan Softyak DK
Shade 230 Cream - 15( 17, 18, 20, 22, 24, 26, 28) balls