US: 4XL to United Kingdom Size 16

US: 4XL: Corresponds to a waist/hip size of 105 $\text{cm}$ (42 $\text{in}$), waist range of 97–107 $\text{cm}$ (38.2–42.1 $\text{in}$), total strap length of 115 $\text{cm}$ (45.3 $\text{in}$), and fit classification Expanded / Plus.

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.