Quick answer
A toddler US 10C is EU 27, UK 9.5 and Japan 16.5, for a foot of 16.3–16.8 cm.
US kids' sizes come in two series: toddler sizes marked C (from 1C to 13.5C) and youth sizes marked Y, which start again at 1Y. UK sizes also restart after 13.5, so always check whether a size is a toddler or a youth size.
Children's feet grow quickly – measure every few months, and leave about 1 cm of growing room in front of the longest toe.
Kids' shoe size conversion chart (baby, toddler and youth)
| US | EU | UK | China | Japan | Foot length |
|---|---|---|---|---|---|
| 1C | 16 | 0.5 | 16 | 9.5 | 9.2–9.9 cm |
| 2C | 17 | 1.5 | 17 | 10 | 9.9–10.6 cm |
| 3C | 18.5 | 2.5 | 18.5 | 11 | 10.6–11.4 cm |
| 4C | 19.5 | 3.5 | 19.5 | 11.5 | 11.4–12 cm |
| 4.5C | 20 | 4 | 20 | 12.5 | 12–12.5 cm |
| 5C | 20.5 | 4.5 | 20.5 | 12.5 | 12.5–12.9 cm |
| 5.5C | 21 | 5 | 21 | 13 | 12.9–13.2 cm |
| 6C | 21.5 | 5.5 | 21.5 | 13.5 | 13.2–13.6 cm |
| 6.5C | 22.5 | 6 | 22.5 | 14 | 13.6–14 cm |
| 7C | 23 | 6.5 | 23 | 14 | 14–14.4 cm |
| 7.5C | 23.5 | 7 | 23.5 | 14.5 | 14.4–14.8 cm |
| 8C | 24.5 | 7.5 | 24.5 | 15 | 14.8–15.2 cm |
| 8.5C | 25 | 8 | 25 | 15.5 | 15.2–15.6 cm |
| 9C | 25.5 | 8.5 | 25.5 | 15.5 | 15.6–15.9 cm |
| 9.5C | 26 | 9 | 26 | 16 | 15.9–16.3 cm |
| 10C | 27 | 9.5 | 27 | 16.5 | 16.3–16.8 cm |
| 10.5C | 27.5 | 10 | 27.5 | 17 | 16.8–17.1 cm |
| 11C | 28 | 10.5 | 28 | 17.5 | 17.1–17.5 cm |
| 11.5C | 28.5 | 11 | 28.5 | 17.5 | 17.5–17.8 cm |
| 12C | 29 | 11.5 | 29 | 18 | 17.8–18.2 cm |
| 12.5C | 30 | 12 | 30 | 18.5 | 18.2–18.7 cm |
| 13C | 30.5 | 12.5 | 30.5 | 19 | 18.7–19 cm |
| 13.5C | 31 | 13 | 31 | 19 | 19–19.4 cm |
| 1Y | 31.5 | 13.5 | 31.5 | 19.5 | 19.4–19.8 cm |
| 1.5Y | 32.5 | 1 | 32.5 | 20 | 19.8–20.2 cm |
| 2Y | 33 | 1.5 | 33 | 20.5 | 20.2–20.7 cm |
| 2.5Y | 34 | 2 | 34 | 21 | 20.7–21.2 cm |
| 3Y | 34.5 | 2.5 | 34.5 | 21.5 | 21.2–21.5 cm |
| 3.5Y | 35 | 3 | 35 | 21.5 | 21.5–21.9 cm |
| 4Y | 35.5 | 3.5 | 35.5 | 22 | 21.9–22.3 cm |
| 4.5Y | 36.5 | 4 | 36.5 | 22.5 | 22.3–22.8 cm |
| 5Y | 37 | 4.5 | 37 | 23 | 22.8–23.3 cm |
| 5.5Y | 38 | 5 | 38 | 23.5 | 23.3–24.2 cm |
| 6Y | 39 | 5.5 | 39 | 24.5 | 24.2–25.3 cm |
Scroll the table to see every size.
Typical equivalents. Brands differ, so check the brand's own chart when it has one. UK sizes restart after 13.5, so UK 4 can mean a toddler or a youth size.
How to measure a child's foot
- Have the child stand on a sheet of paper, heel against a wall, with their weight on both feet.
- Mark the tip of the longest toe and measure from the wall in centimeters.
- Add about 1 cm for growing room and find that length in the last column.
Questions
What do C and Y mean in kids' shoe sizes?
C stands for child or toddler sizes (1C to 13.5C) and Y for youth sizes (1Y and up), worn by older children.
How much room should kids' shoes have?
About 1 cm (a thumb's width) between the longest toe and the front of the shoe.