You will need 4 Buttons. Rowan used #TGB4464 - metal 1” (25 mm) buttons.

Finished measurements:
Bust circumference: 38.5( 42.25, 46.25, 50.25, 54.25, 58, 62, 66, 71.25)“ 97.5( 107.5, 117.5, 127.5, 137.5, 147.5, 157.5, 167.5 ,181) cm
Finished length: 19( 19.75, 20.5, 21.25, 22, 22.75, 23.25, 24, 24.75)” 48( 50, 52, 54, 56, 58, 59, 61, 63) cm
Sleeve seam: 16.25( 16.5, 16.5, 17, 17, 17, 17, 17, 17)“ 41( 42.42, 43, 43,43, 43, 43, 43) cm

Yarn Used:
Rowan Felted Tweed
A. 152 Watery - 3(3, 3, 4, 4, 4, 5, 5, 5) balls
B. 185 Frozen - 2(2, 2, 3, 3, 3, 3, 4, 4) balls
C. 208 Iolite - 2(2, 3, 3, 3, 3, 4, 4, 4) balls