You will need 10 x .5 - .625” (1 cm) buttons.

Finished measurements:
Bust circumference: 34.5(38.5, 42.5, 46.75, 50.25)“ 87.5(98, 108, 118.5, 127.5) cm
Finished length: 19.75(20.5, 21.25, 22, 22.75)” 50(52, 54, 56, 58) cm
Sleeve to underarm: 17.75(17.75, 18, 18, 18)“ 45(45, 46, 46, 46) cm

Yarn used:
Rowan Fine Lace
A. 920 Cameo - 3(3, 3, 4, 4) balls
B. 956 Azalea - 1 ball for all sizes
C. 953 Ruby - 1 ball for all sizes
D. 926 Vintage - 1 ball for all sizes