You will need a cable needle.
You will also need a circular needle size US 6 (4.0 mm) no longer than 20” (50cm) for the neckline

Finished measurements:
Bust: 36(40, 44 ,48 ,52)“ 92(102, 112, 122, 132) cm
Finished length: 21.5(22, 23, 23.5, 24)” 54(56, 58, 60, 62) cm
Sleeve length: 17.5(17.5, 18, 18, 18)“ 45(45, 46, 46, 46) cm
Sleeve cap: 5.5(6, 6, 6.5, 6.5)” 14.5(15, 15.5, 16.5, 17) cm

Yarn used:
Rowan Kid Classic
Feather #828 6(7, 8, 9, 9) balls