You will need 4(4, 5, 5) buttons. Sirdar used their buttons # B5600-0096.

Finished measurements:
Chest circumference: 17.25(19, 21.75, 24)“ 45(50, 55, 61) cm
Finished length: 8.75(9.5, 11.75, 14)” 22(24, 30, 36) cm
Sleeve length: 6(6.5, 8, 9.5)“ 15(17, 20, 24) cm

Yarn used:
Sirdar Snuggly Cashmere Merino Silk DK
A. 306 Silvery Moon - 2(2, 3, 3) balls
B. 300 Piglet - 1(1, 2, 2) balls

This pattern is available only through the printed or eBook Sirdar 563 Snuggly Favorites

A softly shaped cardigan shape with softly rounded collars and fastened with three buttons is an extra layer to keep your baby comfortable on all their adventures.