To fit sizes: 6m (9m, 12m, 18m, 24m, 4yr, 6yr)
Sample size 18m

Pattern should read:

Garter stitch pattern
Row 1: (RS) Knit.
Row 2: Knit.
Row 3: Knit.
Row 4: Knit.
Row 5: Knit.
Row 6: Purl.
Rep Rows 1–6 for garter st pattern.

Sleeves
Begin 2x2 rib
Row 2: K1, (k2, p2) to last st, k1.

Yoke, after joining rnd:
Work back and forth in St st for 3 (1, 3, 3, 1, 3, 5) rows.