US: M to United Kingdom Size 12

Cross-market women’s belt and cinch conversion mapping M specifications into 12.

Analyzing Women’s Belt Size Equivalence Across Markets

US: M: 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.

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.