You will need a cable needle.

You will also need a size US 2.5 (3.0 mm) circular needle, no longer than 16” (40 cm) for finishing.

Finished measurements:
Chest circumference: 35.75( 39.75, 43.75, 47.75, 51.5, 55.5, 59.5, 63.5, 68)“ 91( 101, 111, 121, 131, 141, 151, 161, 172.5) cm
Finished length: 19( 19.75, 20.5, 21.25, 22, 22.75, 23.25, 24, 24.5)” 48( 50, 52, 54, 56, 58, 59, 61, 62) cm
Sleeve seam: 16.5( 17, 17, 17.25, 17.25, 17.25, 17.25, 17.25, 17.25)“ 42( 43, 43, 44, 44, 44, 44, 44, 44) cm

Yarn used:
Rowan Cotton Trio
A. 112 Caramel - 9(9, 10, 12, 13, 14, 15, 16, 17) balls
B. 111 Polar - 1(2, 2, 2, 2, 2, 2, 2, 2) balls