US: 3XL to United Kingdom Size 14
Cross-market women’s belt and cinch conversion mapping 3XL specifications into 14.

Analyzing Women’s Belt Size Equivalence Across Markets
US: 3XL: Corresponds to a waist/hip size of 100 (40 ), waist range of 91–102 (35.8–40.2 ), total strap length of 110 (43.3 ), and fit classification Expanded / Plus.
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.