You will need 5 buttons, approximately 3/4” (18 mm).

Finished measurements:
Chest circumference: 25.25( 26, 27.5, 28.25, 29.25)“ 64( 66, 70, 72, 74) cm
Finished length: 15.75( 16.5, 17.25, 18, 19)” 40( 42, 44, 46, 48) cm
Sleeve length: 11(11.75, 12.5, 13.5, 14)“ 26(30, 32, 34, 36) cm

Yarn used:
Sirdar Snuggly Replay
A. 119 Good as Gold - 1 ball for all sizes
B. 116 Race Car Red - 2(2, 2, 3, 3) balls
C. 129 Blast Off Blue - 1(2, 2, 2, 2, 2) balls
D. 100 Whizz Kid White - 1(1, 2, 2, 2) balls