You will need 3 buttons - approximately 5/8” (15 cm) each. Rowan used #TGB3020 from Textile Garden in the UK.

Finished measurements:
Chest circumference: 20.75( 21.25, 21.75, 23, 23.5, 24.25, 25.5)“ 52.5( 54, 55.5, 58.5, 60, 61.5, 64.5) cm
Finished length: 9.5( 10.25, 11, 11.75, 12.5, 13.5, 14.25)” 24( 26, 28, 30, 32, 34, 36) cm
Sleeve seam:5( 5.75, 6.5, 7.25, 8, 9, 10)“ 12.5( 14.5m 16.5m 18.5m 20.5m 23m 25.5) cm

Yarn used:
Rowan Baby Cashsoft Merino
A. 121 Nutkin - 1 ball for all sizes
B. 126 Puddle - 2(2, 2, 3, 3, 3, 3) balls
C. 108 Sea Green - 1 ball for all sizes
D. 124 Duckling - 1 ball for all sizes