S — Sock length: 10 cm · Recommended age: 0–1 year
M — Sock length: 12 cm · Recommended age: 1–3 years
L — Sock length: 14 cm · Recommended age: 3–5 years
How to measure foot length:
1. Have the child stand barefoot with the heel against a wall.
2. Mark the position of the longest toe.
3. Measure from the heel to the longest toe with a ruler.
Choose the size mainly according to the child's foot length. Measurements are taken manually and slight variation may occur.