Europe Size 41-43 to US: 6-12M

Europe Size 41-43: Corresponds to a head circumference baseline of 42.5 $\text{cm}$ (16.7 $\text{in}$), neck circumference of 24 $\text{cm}$, shoulder width of 22 $\text{cm}$, and age range 3–6 $\text{months}$.

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 $\text{months}$.