You will need 5 buttons, approximately .75” (18 mm). Rowan used pale coco shell buttons #TGB4915 from Textile Garden in the UK.

You will also need a size US 3 (3.25 mm) circular needle at least 48” (120 cm) long for finishing.

Finished measurements
Chest circumference: 32.5( 36, 40.25, 44, 48.25, 51.75, 56, 59.75, 64.5)“ 82.5( 91.5, 102.5, 111.5, 122.5, 131.5, 142.5, 151.5, 164) cm
Finished length: 19.75( 20.5, 21.25, 22, 22.75, 23.5, 24, 24.75, 25.25)” 50( 52, 54, 56, 58, 60, 61, 63, 64) cm
Sleeve seam:17.25( 17.75, 17.75, 18, 18, 18, 18, 18, 18)“ 44( 45, 45, 46, 46, 46, 46, 46, 46) cm

Yarn used:
Rowan Pure Alpaca
A. 113 Mizzle - 7(8, 8, 9, 10, 11, 12, 13, 13) balls
B. 114 Camel - 4(5, 5, 6, 6, 7, 7, 7, 8) balls
C. 130 Thunder - 1 ball for all sizes.