Age US Size UK Size EU Size Foot Length (in/cm)
Newborn 0 0 16 3.5 in / 9 cm
0–6 months 1 0 17 4.0 in / 10 cm
6–12 months 2 1 18 4.4 in / 11 cm
12–18 months 3 2 19 4.8 in / 12 cm
18–24 months 4 3 20 5.0 in / 12.7 cm
2 years 5 4 21 5.3 in / 13.5 cm
3 years 6 5 22 5.7 in / 14.5 cm
4 years 7 6 23 6.0 in / 15.2 cm
5 years 8 7 24 6.3 in / 16 cm
6 years 9 8 25 6.6 in / 16.8 cm
7 years 10 9 26 7.0 in / 17.8 cm
8 years 11 10 27 7.3 in / 18.5 cm
9 years 12 11 28 7.6 in / 19.3 cm
10 years 13 12 29 7.9 in / 20 cm
11 years 1 13 30 8.2 in / 20.8 cm
12 years 2 1 31 8.5 in / 21.6 cm
13 years 3 2 32 8.9 in / 22.5 cm
14 years 4 3 33 9.2 in / 23.3 cm
15 years 5 4 34 9.4 in / 23.8 cm
16 years 6 5 35 9.6 in / 24.4 cm
17 years 7 6 36 9.9 in / 25.1 cm
18 years 8 7 37 10.2 in / 25.9 cm