Please pay most attention to length (height)
Size Chart
Units: Centimeters
70=3M-6M:length=30 bust=58 sleeve=18, fits for: 50-55cm height / 0-6 Months
80=9M-12M:length=33 bust=62 sleeve=20, fits for: 55-65cm height / 6-12 Months
90=18M:length=35 bust=64 sleeve=22, fits for: 65-75cm height / 12-18 Months
100=24M:length=37 bust=66 sleeve=24, fits for: 75-85cm height / 18-24 Months