United Kingdom Size 28–30 to US: XL (16–18)

United Kingdom Size 28–30: Waist contouring range of 99.1–104.1 $\text{cm}$ (39–41 $\text{in}$), full hip range of 124.5–129.5 $\text{cm}$ (49–51 $\text{in}$), style variants Extended Plus Briefs & Comfort Foundations, and fit classification Full Figure Plus Fit.

US: XL (16–18): Waist contouring range of 83.8–88.9 $\text{cm}$ (33–35 $\text{in}$), full hip range of 109.2–114.3 $\text{cm}$ (43–45 $\text{in}$), style variants Full Briefs, High-Waist & Boy Shorts, and fit classification Generous Full Fit.