SIZE GUIDES / Footwear
International Shoe Size Conversion Chart — Kids & Babies
Compare baby, toddler, children’s and youth shoe sizes in US, UK and EU systems, with heel-to-toe measurements in centimeters or inches.
Updated: · No sign-up required
Find a country or size system
Choose a country to jump to its size chart. Use the chart for the brand you plan to buy; unavailable systems cannot be converted here.
The current adidas source lists US, UK, Europe and foot length. It does not publish Russia, Japan, Korea or S-M-L conversions in this dataset; do not turn its measured centimetres into regional shoe labels.
Babies & toddlers
Don’t know your size? Use measurements
Enter your body measurements. If several ranges overlap, the first match is shown; between two listed measurements, the larger size is shown. Check the product’s fit before buying. adidas · kids footwear reference
Choose a size to highlight matches, or select a row below.
Scroll sideways for the full chart
| US | UK | Europe (EU) | Foot length (cm) |
|---|---|---|---|
| 0k | 16 | 8.1 | |
| 1k | 17 | 9 | |
| 2k | 18 | 9.8 | |
| 3k | 19 | 10.6 | |
| 4k | 20 | 11.5 | |
| 5k | 21 | 12.3 | |
| 5.5k | 22 | 12.8 | |
| 6k | 23 | 13.2 | |
| 6.5k | 23.5 | 13.6 | |
| 7k | 24 | 14 | |
| 7.5k | 25 | 14.5 | |
| 8k | 25.5 | 14.9 | |
| 8.5k | 26 | 15.3 | |
| 9k | 26.5 | 15.7 | |
| 9.5k | 27 | 16.1 |
This is a named brand’s reference, not a universal conversion. Other brands and fits can differ.
Brand size guide: adidas · kids footwear reference
Children
Don’t know your size? Use measurements
Enter your body measurements. If several ranges overlap, the first match is shown; between two listed measurements, the larger size is shown. Check the product’s fit before buying. adidas · kids footwear reference
Choose a size to highlight matches, or select a row below.
Scroll sideways for the full chart
| US | UK | Europe (EU) | Foot length (cm) |
|---|---|---|---|
| 10k | 28 | 16.6 | |
| 10.5k | 28.5 | 17 | |
| 11k | 29 | 17.4 | |
| 11.5k | 30 | 17.8 | |
| 12k | 30.5 | 18.3 | |
| 12.5k | 31 | 18.7 | |
| 13k | 31.5 | 19.1 | |
| 13.5k | 32 | 19.5 | |
| 1 | 33 | 20 | |
| 1.5 | 33.5 | 20.4 | |
| 2 | 34 | 20.8 | |
| 2.5 | 35 | 21.2 |
This is a named brand’s reference, not a universal conversion. Other brands and fits can differ.
Brand size guide: adidas · kids footwear reference
Youth & teens
Don’t know your size? Use measurements
Enter your body measurements. If several ranges overlap, the first match is shown; between two listed measurements, the larger size is shown. Check the product’s fit before buying. adidas · kids footwear reference
Choose a size to highlight matches, or select a row below.
Scroll sideways for the full chart
| US | UK | Europe (EU) | Foot length (cm) |
|---|---|---|---|
| 3 | 35.5 | 21.6 | |
| 3.5 | 36 | 22.1 | |
| 4 | 36 2/3 | 22.5 | |
| 4.5 | 37 1/3 | 22.9 | |
| 5 | 38 | 23.3 | |
| 5.5 | 38 2/3 | 23.8 | |
| 6 | 39 1/3 | 24.2 | |
| 6.5 | 40 | 24.6 | |
| 7 | 40 2/3 | 25 |
This is a named brand’s reference, not a universal conversion. Other brands and fits can differ.
Brand size guide: adidas · kids footwear reference
Avoid mixing baby, child and youth shoe numbers
Children’s shoe numbering can restart between ranges. Keep the adidas k suffix and the selected age-group table visible: a child 1 and a baby 1k are different labels. Measure heel to longest toe while the child is standing, and compare both feet rather than estimating from age or clothing size.
The listed measurements are the brand’s foot references, not insole lengths. Before adding growth room, read the product’s fitting instructions so an allowance is not counted twice. Check fastening, toe shape and heel hold during fitting; a numerical conversion alone cannot establish whether a child can walk comfortably.
See how a size converts
In Babies & toddlers choose US 6.5k. The listed equivalents are:
- US 6.5k
- UK 6k
- Europe (EU) 23
Brand size guide: adidas · kids footwear reference
Open this example in the converter →Three checks before ordering
- Match the product brand, country system and garment type to the selected table.
- Keep body and garment measurements separate, with consistent centimetre or inch units.
- Check the specific style’s length, width and stretch, then read the store’s sizing and exchange information.
START WITH MEASUREMENTS
How to measure
- 01
Stand on a firm floor with your usual socks. Mark the heel and longest toe on paper while keeping your weight on the foot.
- 02
Measure the distance between the marks for both feet and use the longer measurement.
- 03
Use the brand’s foot-length guide. Do not treat a CM/JP label as measured foot length, or add an allowance twice.
A few things labels don’t tell you.
Keep the “k” suffix when comparing adidas toddler labels. US numbering restarts at 1 after 13.5k in this reference. Use measured foot length instead of guessing from age.
Common questions
Why is US 1 listed after 13.5k?
The child scale rolls over into the next range. US 1k and US 1 belong to different ranges in this adidas reference.
Are the measurements shoe interior lengths?
No. They are heel-to-toe foot measurements from the adidas reference, not insole lengths.
Should I add extra length before using the chart?
Compare the measured foot with the brand’s instructions first. Adding room automatically can double-count an allowance already built into the sizing.
Can I convert kids’ & baby shoes to Russia, Japan, Korea or S-M-L?
The current adidas source lists US, UK, Europe and foot length. It does not publish Russia, Japan, Korea or S-M-L conversions in this dataset; do not turn its measured centimetres into regional shoe labels.