Europe Size 104 to US: 0-3M

Europe Size 104: Corresponds to a height baseline of 104 $\text{cm}$ (40.9 $\text{in}$), a weight baseline of 17 $\text{kg}$ (37.5 $\text{lbs}$), and a chest baseline of 59 $\text{cm}$ (23.2 $\text{in}$).

US: 0-3M: 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 $\text{in}$).