Size Guide:
Size(cm)
11 Insole Length: 10.5 Outsole Length: 11    Insole Width: 5.6    Advised Age: 0-6 Months
12 Insole Length: 11.5 Outsole Length: 12    Insole Width: 5.8    Advised Age: 6-12 Months
13 Insole Length: 12.5 Outsole Length: 13    Insole Width: 6      Advised Age: 12-18 Months

Size(inch)
11 Insole Length: 4.13 Outsole Length: 4.33 Insole Width: 2.20 Advised Age: 0-6 Months
12 Insole Length: 4.53 Outsole Length: 4.72 Insole Width: 2.28 Advised Age: 6-12 Months
13 Insole Length: 4.92 Outsole Length: 5.12 Insole Width: 2.36 Advised Age: 12-18 Months