You will need 7 buttons. Rowan used # BF 8351 5/8” (1.5 cm) from Groves and Banks in the UK>

Finished measurements:
Bust circumference: 34.75(38.75, 42.75, 46.25, 50.5)“ 88(98.5, 108.5, 117.5, 128) cm
Finished length: 20.75(21.75, 22.5, 23.25, 24)” 53(55, 57, 59, 61) cm
Sleeve to armhole: 12.5(12.5, 13, 13, 13)“ 32(32, 33, 33,33) cm

Yarn used:
Rowan Cotton Glace
Shade 833 Ochre - 9(10, 11, 12, 13) balls