You will need one button. Sirdar used their button #B5600-0097

Finished measurements:
Chest circumference: 16.5(18, 19.75, 20.5, 21.25,22)“ 42(46, 50, 52, 54, 56) cm
Finished length: 9.5(10.25, 1.5, 12, 13, 13.75)” 24(26, 29, 31, 33, 35) cm
Sleeve length: 6.25(6.5, 7, 8, 8.75, 9.75)“ 16(17, 18, 20, 22, 25) cm

Yarn used:
Sirdar Snowflake Chunky
Solid Cardigan: Shade 205 Hush - 2(2, 2, 2, 2, 3) balls

Two Color Cardigan:
A - Shade 206 Lullaby - 1(1, 2, 2, 2, 2) balls
B - Shade 202 Story Time - 1 ball for all sizes