Europe Size 41 to US: 6-12M

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

US: 6-12M: Corresponds to a head circumference baseline of 44 $\text{cm}$ (17.3 $\text{in}$) and age range 6–12 $\text{months}$.