You will need 3 buttons. Rowan used 1” (2.5 cm) shank buttons
You will also need a size US9 (5.5 mm) circular needle at least 48” (120 cm) long for finishing.

Finished measurements:
Bust circumference: 32.5(36.5, 40.25, 44.25, 48.25, 52.25, 56, 60, 65)“ 82.5(92.5, 102.5, 112.5, 122.5, 132.5, 142.5, 152.5, 165) cm
Finished length: 21.75, 22.75, 23.25, 24.25, 25, 25.5, 26, 26.75, 27.75)” 55.5, 57.5, 59., 61.5, 63.5, 65, 66, 68, 70.5) cm
Sleeve length to underarm: 12.5(13, 13, 13.5, 13.5, 13.5, 13.5, 13.5, 13.5)“ 32(33, 33, 34, 34, 34, 34, 34, 34) cm

Yarn used:
Rowan Tweed Haze
A. 557 Sunset - 5(5, 5, 6, 6, 7, 7, 8, 8) balls
B. 550 Winter - 3(3, 3, 3, 4, 4, 4, 5, 5) balls