Europe Size 86 to US: 6-9M

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: 6-9M: Corresponds to a height baseline of 68 $\text{cm}$ (26.8 $\text{in}$), a weight baseline of 8 $\text{kg}$ (17.6 $\text{lbs}$), and a chest baseline of 47 $\text{cm}$ (18.5 $\text{in}$).