Europe Size 34 to US: 18-24M

Europe Size 34: Corresponds to a head circumference baseline of 34 $\text{cm}$ (13.4 $\text{in}$) and age range 0–1 $\text{months}$.

US: 18-24M: Corresponds to a head circumference baseline of 48 $\text{cm}$ (18.9 $\text{in}$) and age range 18–24 $\text{months}$.