United Kingdom Size 16-18 to US: 12-14

United Kingdom Size 16-18: Corresponds to a relaxed bust range of 97–101 $\text{cm}$ (38.2–39.8 $\text{in}$), elastic waist range of 79–84 $\text{cm}$ (31.1–33.1 $\text{in}$), and comfort drape classification Relaxed / Comfort Drape.

US: 12-14: Corresponds to a relaxed bust range of 97–101 $\text{cm}$ (38.2–39.8 $\text{in}$), elastic waist range of 79–84 $\text{cm}$ (31.1–33.1 $\text{in}$), and comfort drape classification Relaxed / Comfort Drape.