Kids shoe size 12 in UK, EU and cm
A kids US 12 shoe is a UK 11 and an EU 30, a foot length of 18.3 cm, which fits most children around 5 to 6 years.
Kids 12 in every system
| US | UK | EU | Foot (cm) | Age |
|---|---|---|---|---|
| 12 | 11 | 30 | 18.3 | 5 to 6 years |
Sizes near kids 12
| US | UK | EU | Foot (cm) | Age |
|---|---|---|---|---|
| 11 | 10 | 28.5 | 17.4 | 4 to 5 years |
| 11.5 | 10.5 | 29 | 18 | 5 years |
| 12 | 11 | 30 | 18.3 | 5 to 6 years |
| 12.5 | 11.5 | 30.5 | 18.8 | 6 years |
| 13 | 12 | 31 | 19.1 | 6 to 7 years |
The age column is indicative only. Two children of the same age can be several sizes apart, so measure the longer foot and buy to that length plus about half a centimetre.
What size 12 actually means
Kids US 12 is a youth size built for a 18.3 cm foot. The UK number for the same length is 11 and the EU number is 30. Those three labels describe one shoe, they just count differently: the UK and US children's scales run in thirds of an inch from a different starting point, and the EU scale runs in Paris points, two thirds of a centimetre per size. Foot length is the part that does not move, which is why it is the column worth trusting when a brand's own chart disagrees.
Children in this range grow fast, often a full size in three to four months, so this size is a snapshot rather than a setting. Check the fit by pressing your thumb across the front of the shoe with the child standing: there should be roughly a thumb's width of space in front of the longest toe, and the heel should not slip when they walk.
For the whole range in one table see the youth shoe size chart, or the full kids shoe size chart by age. To measure at home, see how to measure shoe size. Once a child moves past the youth range, the adult shoe size chart takes over at the same foot lengths.
Common questions
What is kids US 12 in UK and EU sizes?
A kids US 12 shoe is a UK 11 and an EU 30, a foot length of 18.3 cm, which fits most children around 5 to 6 years.
How many cm is a kids 12?
18.3 cm of foot length. Buy with about half a centimetre of growing room on top of that, so a child measuring 18.3 cm today is comfortable in this size for the next couple of months rather than out of it immediately.
What age is a kids shoe size 12?
Roughly 5 to 6 years, but age bands are only a guide. Children of the same age can be two or three sizes apart, so measure the foot rather than buying by age. This size is built for a 18.3 cm foot.
How often should I re-measure?
Every two to three months for children under four, and every three to four months after that. Feet grow in bursts rather than steadily, so a size that fits well can become too short in a few weeks.
Last reviewed and updated on July 25, 2026. Conversion tables are checked against published international sizing standards.