US: 12-14 to United Kingdom Size 6

US: 12-14: Waist range of 76–82 $\text{cm}$ (29.9–32.3 $\text{in}$), hip range of 102–108 $\text{cm}$ (40.2–42.5 $\text{in}$), lengths (Mini/Midi/Maxi): 47/80/105 $\text{cm}$ (18.5/31.5/41.3 $\text{in}$), and fit style Fitted Waist / A-Line & Straight.

United Kingdom Size 6: Waist range of 60–64 $\text{cm}$ (23.6–25.2 $\text{in}$), hip range of 86–90 $\text{cm}$ (33.9–35.4 $\text{in}$), lengths (Mini/Midi/Maxi): 42/75/100 $\text{cm}$ (16.5/29.5/39.4 $\text{in}$), and fit style Fitted Waist / A-Line & Straight.