You will need10 buttons, approximately 3/8” (10mm) each. Rowan used #TGB4679 grey mother of pearl from Textile Garden in the UK.

Finished measurements
Chest circumference: 32( 36.25, 40.25, 44, 47.75, 52, 56, 59.75, 64.25)“ 81.5( 92, 102.5, 111.5, 121.5, 132, 142.5, 151.5, 163.5) cm
Finished length: 22( 22.75, 23.5, 24.5, 25, 25.75, 26.5, 27.25, 27.75)” 56( 58, 60, 62.5, 63.5, 65.5, 67, 69, 70.5) cm
Sleeve seam:17.75, 18, 18, 18.5, 18.5, 18.5, 18.5, 18.5, 18.5)“ 45( 46, 46, 47, 47, 47, 47, 47, 47) cm

Yarn used:
Rowan Pure Alpaca
Shade 118 Plum - 10(11, 12, 14, 15, 16, 17, 18, 19) balls