US: 4XL to United Kingdom Size 12

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 12: Corresponds to a waist/hip size of 80 $\text{cm}$ (32 $\text{in}$), waist range of 71–81 $\text{cm}$ (28–31.9 $\text{in}$), total strap length of 90 $\text{cm}$ (35.4 $\text{in}$), and fit classification Standard Waist / Hip.