You will need 3(3, 3, 3, 4, 4, 4) shank buttons .5 - .625” (15 mm) each. Rowan used #TGB3020 from the Textile Garden in the UK

Finished measurements:
Chest circumference: 20.75( 21.25, 21.75, 25, 23.5, 24.25, 25.5)“ 52.5( 54, 55.5, 58.5, 60, 61.5, 64.5) cm
Finished length: 7.75( .8.25, 9.5, 10.25, 11, 11.75, 12.5)” 20( 22, 24, 26, 28, 30, 32) cm

Yarn used:
Rowan Baby Cashsoft Merino
A. 122 Piglet - 1 ball for all sizes
B. 107 Baby Blue - 1(1, 1, 1, 2, 2, 2) balls
C> 121 Nutkin - 1(1, 1, 1, 1, 1, 2) balls