Kids sizing:

(Age : height in centimeters) 

6m : 85 cm

1-2Y : 100 cm

3-4Y : 110 cm

5-6Y : 120 cm

7-8Y : 130 cm

9-10Y : 140 cm

11-12Y : 150 cm

Women's sizing:

(British: European dress sizing)

S- UK8 : EU36 

M- UK10 : EU38

L- UK12 : EU40

XL- UK14 : EU42