United Kingdom Size 12 to US: 4 S

United Kingdom Size 12: Features a height of 172 $\text{cm}$ (67.7 $\text{in}$), bust contour of 94 $\text{cm}$ (37 $\text{in}$), waist shaping of 75 $\text{cm}$ (29.5 $\text{in}$), hip flare of 100 $\text{cm}$ (39.4 $\text{in}$), and silhouette cut: Natural Waist / Evening Gown.

US: 4 S: Features a height of 170 $\text{cm}$ (66.9 $\text{in}$), bust contour of 90 $\text{cm}$ (35.4 $\text{in}$), waist shaping of 71 $\text{cm}$ (28 $\text{in}$), hip flare of 96 $\text{cm}$ (37.8 $\text{in}$), and silhouette cut: Empire / Fit-and-Flare.