Europe Size 46 to US: 3-6M

Europe Size 46: Corresponds to a head circumference baseline of 46 $\text{cm}$ (18.1 $\text{in}$) and age range 12–18 $\text{months}$.

US: 3-6M: Corresponds to a head circumference baseline of 41 $\text{cm}$ (16.1 $\text{in}$) and age range 3–6 $\text{months}$.