Mocs: 
Age of child           Size of shoe (inner measurement)

0-3 MONTHS               10.5 CM

0-6 MONTHS               11.5 CM
3-6 MONTHS               11.5 CM
6-12 MONTHS             12.5 CM
12-18 MONTHS           13.5 CM
18-24 MONTHS           14.5 CM
2-3 YEARS                   16 CM
3-4 YEARS                   17 CM

Sandals
Astrid´s Collection
Vacay Collection
Chill Collection

Age of child           Size of shoe (inner measurement)

12-18 MONTHS           13.5 CM
18-24 MONTHS           15  CM
2-3 YEARS                   16 CM
3-4 YEARS                   17 CM


Sandal Beach Collection: 

Age of child           Size of shoe (inner measurement)

0-6 MONTHS               11.8 CM
6-12 MONTHS             12.5 CM
12-18 MONTHS           13.5 CM
18-24 MONTHS           15  CM
2-3 YEARS                   16 CM
3-4 YEARS                   17.5 CM


SIZE EXAMPLE: 

The centimeters listed is the inner measurement of the shoe.
In other words - if the length of your child’s foot is 16 cm - he or she should wear a size 3-4 years, to allow for a 1 cm to fit and grow in.