Europe Size 49-51 to US: 6-12M

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: 6-12M: Corresponds to a head circumference baseline of 45 $\text{cm}$ (17.7 $\text{in}$), neck circumference of 26 $\text{cm}$, shoulder width of 24 $\text{cm}$, and age range 6–12 $\text{months}$.