United Kingdom Size 16 to US: L

United Kingdom Size 16: Corresponds to a waist/hip size of 90 $\text{cm}$ (36 $\text{in}$), waist range of 81–91 $\text{cm}$ (31.9–35.8 $\text{in}$), total strap length of 100 $\text{cm}$ (39.4 $\text{in}$), and fit classification Relaxed Waist / Hip.

US: L: Corresponds to a waist/hip size of 85 $\text{cm}$ (34 $\text{in}$), waist range of 76–86 $\text{cm}$ (29.9–33.9 $\text{in}$), total strap length of 95 $\text{cm}$ (37.4 $\text{in}$), and fit classification Standard Waist / Hip.