Europe Size 49-51 to US: 0-3M

Europe Size 49-51: Corresponds to a head circumference baseline of 50 $\text{cm}$ (19.7 $\text{in}$), neck circumference of 30 $\text{cm}$, shoulder width of 28 $\text{cm}$, and age range 24–48 $\text{months}$.

US: 0-3M: Corresponds to a head circumference baseline of 40 $\text{cm}$ (15.7 $\text{in}$), neck circumference of 22 $\text{cm}$, shoulder width of 20 $\text{cm}$, and age range 0–3 $\text{months}$.