United Kingdom Size 24 to US: XS

United Kingdom Size 24: Corresponds to a waist/hip size of 110 $\text{cm}$ (44 $\text{in}$), waist range of 102–112 $\text{cm}$ (40.2–44.1 $\text{in}$), total strap length of 120 $\text{cm}$ (47.2 $\text{in}$), and fit classification Extended Plus.

US: XS: Corresponds to a waist/hip size of 70 $\text{cm}$ (28 $\text{in}$), waist range of 60–70 $\text{cm}$ (23.6–27.6 $\text{in}$), total strap length of 80 $\text{cm}$ (31.5 $\text{in}$), and fit classification Waist / Snug Cinch.