The Cardigan, which may be either a plain or a contrast version, is for Boy or Girl.

The plain version uses one yarn. But if it is decided to make the contrast version, a second yarn is also needed.

Measurements
To fit chest
46 51 56 61 cm (18 20 22 24 in)
Length from back neck
25.5 30.5 33 38 cm (10 12 13 15 in)
Sleeve seam
15 19 20.5 26.5 cm (6 7½ 8 10½ in)

Each source has a different set of recommended yarns. The following is from the King Cole version.

Materials
Big Value Baby Double Knitting
2 2 2 2 100 gram balls
Stitch holders
5 5 5 6 buttons.