Tunic and bloomer in sizes 3/ 6/ 12 and 18 months

3/3/4/4 skeins of « milk cotton dk » from Rowan (113 m /50 g)
3.5 mm needles, 3.5 mm hook
1 x 12 mm button
Gauge in St st: 23 sts x 32 rows = 10 x 10 cm (4” x 4”)
K1fb: Knit one stitch through front and back