You will need 5 buttons. Rowan used #G422830 from Groves and Banks in the UK.

Finished measurements:
Bust Circumference: 39.5(43.5, 47, 51, 55)“ 100(110, 120, 130, 140) cm
Finished Length: 33.5(34.5, 35, 36, 36.5)” 85(87, 89, 91, 93) cm
Sleeve to Underarm: 19.5(19.5, 20, 20, 20)“ 50(50 ,51, 51, 51) cm

Yarn used:
Rowan Felted Tweed
A. Clay 177 - 4(4, 4, 5, 5) balls
B. Maritime 167 (4, 5, 5, 6, 6) balls

Rowan Kidsilk Haze - Used double throughout.
C. Candy Girl 606 - 8(9, 9, 9, 10) balls