You will need a cable needle.

Finished measurements:
Back width: 23(25.25, 27, 29.25, 31)“ 58.5(64, 68.5, 74, 78.5) cm
Finished length: 33.75(34.75, 35.5, 36.258, 37) “ 86(88, 90, 92, 94) cm
Sleeve to underarm: 17.75(17.75, 18, 18, 18)” 45(45, 46, 46, 46) cm

Yarn used:
Rowan Softyak DK
Shade 244 Driftwood - 16(17,19,20,22) balls