US: 12 to Europe Size 98

US: 12: Corresponds to a height baseline of 152 $\text{cm}$ (59.8 $\text{in}$), chest/bust baseline of 76 $\text{cm}$ (29.9 $\text{in}$), and waist baseline of 65 $\text{cm}$ (25.6 $\text{in}$).

Europe Size 98: Corresponds to a height baseline of 98 $\text{cm}$ (38.6 $\text{in}$), chest/bust baseline of 53 $\text{cm}$ (20.9 $\text{in}$), and waist baseline of 51 $\text{cm}$ (20.1 $\text{in}$).