US: 6-9M to Europe Size 56

US: 6-9M: Corresponds to a height baseline of 68 $\text{cm}$ (26.8 $\text{in}$), a weight baseline of 8 $\text{kg}$ (17.6 $\text{lbs}$), and a chest baseline of 47 $\text{cm}$ (18.5 $\text{in}$).

Europe Size 56: Corresponds to a height baseline of 56 $\text{cm}$ (22 $\text{in}$), a weight baseline of 5 $\text{kg}$ (11 $\text{lbs}$), and a chest baseline of 41 $\text{cm}$ (16.1 $\text{in}$).