Sizing
Sizing Charts

| Age (months): |
Length: |
| 0-6 months |
4.2 in/10.7 cm |
| 6-9 months |
4.5 in/11.5 cm |
| 9-12 months |
4.8 in/12.3 cm |
| 12-18 months |
5.2 in/13.1 cm
|
| 18-24 months |
5.5 in/13.9 cm |

- EU Size
- US Size
- Australian
- Inside Length
- Approximate Age
- 19
- 3
- 2
- 4.5 inches/11.5 cm
- 6-9 months
- 20
- 4
- 3
- 4.8 inches/12.3 cm
- 9-12 months
- 21
- 5
- 4
- 5.2 in/13.1 cm
- 12-18 months
- 22
- 6
- 5
- 5.5 in/13.9 cm
- 18-24 months
- 23
- 7
- 6
- 5.8 in/14.7 cm
- 2 years
- 24
- 8
- 7
- 6.1 in/15.5 cm
- 2.5 years
- 25
- 9
- 8
- 6.4 in/16.3 cm
- 3 years

- EU Size
- US Size
- Australian
- Inside Length
- Approximate Age
- 24
- 8
- 7
- 6.1 inches/15.5 cm
- 2.5 - 3 years
- 24
- 8.5
- 7.5
- 6.3 inches/15.9 cm
- 2.5 - 3 years
- 25
- 9
- 8
- 6.4 inches/16.3 cm
- 3 - 3.5 years
- 26
- 9.5
- 8.5
- 6.6 inches/16.7 cm
- 3 - 3.5 years
- 27
- 10
- 9
- 6.7 inches/17.1 cm
- 3.5 - 4 years
- 28
- 10.5
- 9.5
- 6.9 inches/17.5 cm
- 3.5 - 4 years
- 29
- 11
- 10
- 7 inches/17.9 cm
- 4 - 4.5 years
- 29
- 11.5
- 10.5
- 7.2 inches/18.3 cm
- 4 - 4.5 years
- 30
- 12
- 11
- 7.4 inches/18.7 cm
- 5 - 5.5 years
- 30
- 12.5
- 11.5
- 7.5 inches/19.1 cm
- 5 - 5.5 years
- 31
- 13
- 12
- 7.7 inches/19.5 cm
- 5.6 - 6 years
Printable Sizing Chart
Click here to print the sizing chart for Smaller, See Kai Run and Kai (make sure you print it out at 100% for accurate sizing) and use it to find out the best size for your child. 'Inside length' on the sizing chart refers to the inside length of the shoe, not your child's foot. Please allow 0.5 to 1 cm growing room when using this chart. For example, if your child's foot sits on or just under the US 4 size line, you will need a size US 5 to allow for growing room.
How to Size Your Child's Feet:
- Have your child stand on a piece of paper. Mark the longest points of the foot, from the longest toe to the back of the heel. Measure this distance in centimeters to get the length.
- Allow .5 - 1 cm extra when selecting shoe size, more if the child will wear thick socks with the shoes.
- Measure often - children's feet grow quickly. Measure at least every 2 months during the first year, and every 3 months from 1 - 3 years. You never can tell when your child will have a growth spurt!
Transitioning from Smaller sizing to See Kai Run Sizing
If your child is about to transition from the Smaller range to the See Kai Range the following guide will help you choose the right size in the See Kai Run range:
- Size US 3 is equivalent to 6-9 months in the Smaller range.
- Size US 4 is equivalent to 9-12 months in the Smaller range.
- Size US 5 is equivalent to 12-18 months in the Smaller range.
- Size US 6 is equivalent to 18-24 months in the Smaller range.