You will also need a circular needle size US 3 (3.25 mm) at least 40” (100 cm) long

You will need 6 buttons. Rowan used # BN1636 from Bedecked in the UK.

Finished measurements:
Chest circumference: 40.25(44.25, 48.25, 58.25, 56, 60)“ 102.5(112.5, 122.5, 132.5, 142.5, 152.5) cm
Finished length: 25.25(26, 26.75, 27.5, 28.25, 29.25)” 64(66, 68, 70, 72, 74) cm
Sleeve length: 18.5(19.25, 20, 20.5, 20.75, 20.75)“ 47(49, 51, 52, 53, 53) cm

Yarn used:
Rowan Summerlite DK
A. 460 Line - 14(15, 17, 19, 20, 22)balls
B. 459 Ocean - 1(1, 1, 1, 2, 2) balls