You will need 7 buttons. Rowan used # BN1979/30 from Bedecked in the UK.

Finished measurements:
Bust circumference: 48.75(52.75, 56.75, 60.75, 64.5)“ 124(134, 144, 154, 164) cm
Finished length: 22.5(23.25, 24, 24.75, 25.5)” 57(59, 61, 63, 65) cm
Sleeve to underarm: 15.75(15.75, 16.25, 16.25, 16.25)“ 40(40, 41, 41, 41) cm

Yarn used:
Rowan Felted Tweed
A. 159 Carbon - 1 ball for all sizes
B. 165 Scree - 1 ball for all sizes
C. 194 Delft - 2(2, 3, 3,3) balls
D. 192 Amethyst - 2 balls for all sizes
E. 179 Seasalter - 2(2, 2, 3, 3) balls
F. 177 Clay - 1 ball for all sizes
G. 204 Vaseline Green - 1 ball for all sizes
H. 184 Celadon - 1 ball for all sizes
I. 205 Lotus Leaf - 2 balls for all sizes