US: 4T to Europe Size 74

US: 4T: Corresponds to an age bracket of 4–5 years (approx. height baseline of 104 $\text{cm}$ / 40.9 $\text{in}$), a head-and-neck opening circumference baseline of 24 $\text{cm}$ (9.4 $\text{in}$), a length baseline of 43 $\text{cm}$ (16.9 $\text{in}$), utilizing soft hypoallergenic stretch standards designed for infants, toddlers, and youth.

Europe Size 74: Corresponds to an age bracket of 6–12 months (approx. height baseline of 74 $\text{cm}$ / 29.1 $\text{in}$), a head-and-neck opening circumference baseline of 18.5 $\text{cm}$ (7.3 $\text{in}$), a length baseline of 27 $\text{cm}$ (10.6 $\text{in}$), utilizing soft hypoallergenic stretch standards designed for infants, toddlers, and youth.