Europe Size 52-54 to US: 6-12M

Europe Size 52-54: Corresponds to a head circumference baseline of 53 $\text{cm}$ (20.9 $\text{in}$), neck circumference of 32 $\text{cm}$, shoulder width of 30 $\text{cm}$, and age range 48–84 $\text{months}$.

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 $\text{months}$.