Materials:
4.50 mm
200 gram any DK worsted yarns (here I am using NAKO Calico cotton yarn)
Button
Scissor to cut
Level: Advanced Beginner to Intermediate
Size: 3 to 4 years old
Abbreviations:
Ch/chs = chain/s
Dc = double crochet
Ss = slip stitch
V-sts = (dc, ch2, dc) in same loop
Shell-st = (3dc, ch2, 3dc) in same loop
… rpt = repeat BETWEEN …
skp = skip
sp = space

Note:

1. The first slip stitch always on the first chain of chain 3 every round.
2. If you need to get a smaller size than this, you can change the size of hook and yarn weight. I recommend you to use 4.00mm hook with DK light weight yarns to achieve the size of 1 to 2 years old. If you need to make for a baby of 1 year below, you may skip Row 9 and 10 or used sport weight yarns with 3.50 mm size of hook.
3. You will notice that the back side of this dress will gives a bit of ruffle look, The ruffle shape at the back side was designed intentionally.