You will need a cable needle and 5 x 3/8 -1/2” (1.1 cm) buttons. Rowan used BN1365 from Bedecked in the UK.

Finished measurements:
Bust circumference: 36.5(41, 45, 48.75, 52.75)“ 92.5(104, 114, 124, 134) cm
Finished length: 23.25(24, 25, 25.75, 26.5)” 59(61, 63.5, 5.5, 67.5) cm
Sleeve to underarm: 17.75(17.75, 18, 18, 18)“ 45(45, 46, 46, 46) cm

Yarn used:
Rowan Summerlite 4 Ply
A. 428 High Tide - 9(10, 11, 13, 14) balls
Rowan Kidsilk Haze
B. 671 Peacock - 8(9, 10, 11, 12) balls