US: S to United Kingdom Size 14
Cross-market women’s belt and cinch conversion mapping S specifications into 14.

Analyzing Women’s Belt Size Equivalence Across Markets
US: S: Corresponds to a waist/hip size of 75 (30 ), waist range of 66–76 (26–29.9 ), total strap length of 85 (33.5 ), and fit classification Standard Waist / Hip.
United Kingdom Size 14: Corresponds to a waist/hip size of 85 (34 ), waist range of 76–86 (29.9–33.9 ), total strap length of 95 (37.4 ), and fit classification Standard Waist / Hip.