This stockinette stitch cardigan knits up quickly in an Aran-weight yarn.  A cotton and silk mixture, the yarn lends the fabric of this classic style a slight hint of sheen.

- From The Baby Knits Book p 39

Measurements:

To fit ages: 3-6 / 6-9 / 6-12 12-24 / 24-36 months

Actual measurements

Chest: 52 / 56 / 60 / 65 / 69 cm (20.5 / 22 / 23.5 / 25.5 / 27.25 inches)

Length to shoulder: 24 / 26 / 28 / 32 / 36 cm (9.5 / 10.25 / 11 / 12.5 / 14.25 inches)

Sleeve length: 15 / 17 / 19 / 22 / 24 cm (6 / 6.75 / 7.5 / 8.75 / 9.5 inches)

Materials:

6 / 6 / 7 / 8 / 9 x 50g balls of Debbie Bliss Cotton/Silk Aran

5 / 5 / 5 / 6 / 6 buttons

From elinor:
Just a note of caution: as with many Debbie Bliss patterns, this knits up larger than the size would indicate. As a general rule, I knit DB’s 3-6 month size for a 6-9 month old baby, adding maybe an inch or two for height. Her patterns tend to be wide and boxy.