You will need stitch holders.

Finished measurements:
Chest circumference:
18(19.75, 21.25, 21.75, 22.5, 24)“
46(50, 53.5, 55, 57, 61)cm.

Finished length:
9.75(10.75, 11.75, 12.5, 13.5, 14)“
25(27, 30, 32, 34, 36) cm

Sleeve length:
6.25(6.5, 7, 8, 8.75, 9.75)“
16(17, 18, 20, 22, 25) cm

Yarn used:
Hayfield Baby Bonus DK
Shade 580 Baby Yellow - 1(1, 2, 2, 2, 2) balls