Shoe size: 150 inner length 14CM with heel elastic band (recommended foot length 12.5-13.5cm) 160 inner length 15CM with heel elastic band (recommended foot length 13.5-14.5cm) 170 inner length 16CM (recommended foot length 14.5-15.5cm) 180 inner Length 17CM (recommended foot length 15.5-16.5cm) 190 inner length 18CM (recommended foot length 16.5-17.5cm) 200 inner length 19CM (recommended foot length 17.5-18.5cm) 210 inner length 20CM (recommended foot length 18.5-19.5cm) 220 inner length 21CM (recommended foot length 19.5-20.5cm) color classification: children yellow (spot) children orange (spot) children green (spot)