US: 20-22 to United Kingdom Size 12-14

US: 20-22: Corresponds to a relaxed bust range of 113–117 $\text{cm}$ (44.5–46.1 $\text{in}$), elastic waist range of 95–100 $\text{cm}$ (37.4–39.4 $\text{in}$), and comfort drape classification Loose Lounge Fit.

United Kingdom Size 12-14: Corresponds to a relaxed bust range of 90–94 $\text{cm}$ (35.4–37 $\text{in}$), elastic waist range of 72–76 $\text{cm}$ (28.3–29.9 $\text{in}$), and comfort drape classification Relaxed / Comfort Drape.