Age AUS Sizing US Sizing CM INCHES
0-3 months 17 1.5 10 3.9
3-6 months 18 2 10.8 4.25
6-9 months 19 3 11.5 4.5
9-12 months 20 4 12.2 4.8
12-15 months 21 5 12.8 5.04
15-18 months 22 6 13.4 5.27
18-21 months 23 7 14.2 5.59
21-24 months 24 8 15 5.9