US: 7 to Europe Size 86

US: 7: Corresponds to a height baseline of 122 $\text{cm}$ (48 $\text{in}$), a weight baseline of 24 $\text{kg}$ (53 $\text{lbs}$), and a chest baseline of 65 $\text{cm}$ (25.6 $\text{in}$).

Europe Size 86: Corresponds to a height baseline of 86 $\text{cm}$ (33.9 $\text{in}$), a weight baseline of 12.5 $\text{kg}$ (27.5 $\text{lbs}$), and a chest baseline of 52 $\text{cm}$ (20.5 $\text{in}$).