You will need 7 x 3/4” (1.8 cm ) buttons.

Finished measurements
Bust circumference: 32(35.25, 39.25, 43.75, 47.75, 51.5, 59.5, 59.5, 61.25)“ 81(91, 101, 111, 121, 131, 141, 151, 163) cm
Finished length: 20.25(21, 21.75, 22.75, 23.5, 24.25, 24.25, 25.5, 25.75)” 51.5(53.5, 55.5, 57.5, 59.5, 61.5, 62.5, 64.5, 65.5) cm
Sleeve to armhole: 17(17.25, 17.25, 17.75, 17.75, 17.75, 17.75, 17.75, 17.75)“ 43(44, 44, 45, 45, 45, 45, 45, 45) cm

Yarn used:
Rowan Pebble Island
Shade 027 Rockhopper - 7(8, 9, 10, 11, 12, 12, 13, 14) balls