Inches | CM | US | EU | UK | Age (Approx.) |
3 1/2 (3.5) | 8.9 | 1 (1C) | 16 | 0.5 | 0-3 mos. |
3 5/8 (3.63) | 9.2 | 2 (2C) | 17 | 1 | 3-6 mos. |
3 7/8 (3.88) | 9.8 | 2.5 (2.5C) | 17.5 | 1.5 | 3-6 mos. |
4 | 10.2 | 3 (3C) | 18 | 2 | 6-9 mos. |
4 1/8 (4.13) | 10.5 | 3.5 (3.5C) | 18.5 | 2.5 | 6-9 mos. |
4 3/8 (4.38) | 11.1 | 4 (4C) | 19 | 3 | 9-12 mos. |
4 1/2 (4.5) | 11.4 | 4.5 (4.5C) | 19.5 | 3.5 | 9-12 mos. |
4 5/8 (4.63) | 11.8 | 5 (5C) | 20 | 4 | 12-18 mos. |
4 7/8 (4.88) | 12.4 | 5.5 (5.5C) | 20.5 | 4.5 | 12-18 mos. |
5 | 12.7 | 6 (6C) | 21 | 5 | 18-24 mos. |
5 1/8 (5.13) | 13 | 6.5 (6.5C) | 21.5 | 5.5 | 18-24 mos. |
5 3/8 (5.38) | 13.7 | 7 (7C) | 22 | 6 | 24 mos. |
5 1/2 (5.5) | 14 | 7.5 (7.5C) | 22.5 | 6.5 | 24 mos. |
5 5/8 (5.63) | 14.3 | 8 (8C) | 23 | 7 | 2-3 yrs |
5 7/8 (5.88) | 14.9 | 8.5 (8.5C) | 23.5 | 7.5 | 2-3 yrs |