United Kingdom Size 16–18 to US: 2XL (20–22)

United Kingdom Size 16–18: Bust interval range of 97.8–104.1 $\text{cm}$ (38.5–41 $\text{in}$), natural waist range of 76.2–82.6 $\text{cm}$ (30–32.5 $\text{in}$), shoulder width of 41.3 $\text{cm}$ (16.25 $\text{in}$), sleeve length of 80 $\text{cm}$ (31.5 $\text{in}$), style variants Blouses, T-Shirts, Tank Tops, Sweaters & Cardigans, and fit classification Relaxed Comfort Fit.

US: 2XL (20–22): Bust interval range of 113–119.4 $\text{cm}$ (44.5–47 $\text{in}$), natural waist range of 91.4–97.8 $\text{cm}$ (36–38.5 $\text{in}$), shoulder width of 45.1 $\text{cm}$ (17.75 $\text{in}$), sleeve length of 82.6 $\text{cm}$ (32.5 $\text{in}$), style variants Plus Blouses, Extended T-Shirts, Sweaters & Knitwear, and fit classification Extended Plus Fit.