US Size 10=EURO 22 = 115-125cm (4-5years)
US Size 12 =EURO 24 =125-135cm (5-6years)
US Size 14= EURO 26=135-145 cm (6-7years)
US Size 16=EURO 28=145-155 cm (7-9years)
US Size 18=EURO 30=155-165 cm (10-12years)
age is for reference, not 100% exact, because some children grow faster.