United Kingdom Size 20 to US: 0 XS

United Kingdom Size 20: Features a height of 175 $\text{cm}$ (68.9 $\text{in}$), bust contour of 112 $\text{cm}$ (44.1 $\text{in}$), waist shaping of 93 $\text{cm}$ (36.6 $\text{in}$), hip flare of 118 $\text{cm}$ (46.5 $\text{in}$), and silhouette cut: Empire / Flowing Gown.

US: 0 XS: Features a height of 165 $\text{cm}$ (65 $\text{in}$), bust contour of 82 $\text{cm}$ (32.3 $\text{in}$), waist shaping of 63 $\text{cm}$ (24.8 $\text{in}$), hip flare of 88 $\text{cm}$ (34.6 $\text{in}$), and silhouette cut: Natural Waist / Shift.