Europe Size 86 to US: 9-12M

Europe Size 86: Corresponds to a height baseline of 86 $\text{cm}$ (33.9 $\text{in}$), a weight baseline of 12 $\text{kg}$ (26.5 $\text{lbs}$), and a chest baseline of 53 $\text{cm}$ (20.9 $\text{in}$).

US: 9-12M: Corresponds to a height baseline of 74 $\text{cm}$ (29.1 $\text{in}$), a weight baseline of 9.3 $\text{kg}$ (20.5 $\text{lbs}$), and a chest baseline of 49 $\text{cm}$ (19.3 $\text{in}$).