United Kingdom Size 15–17.5 to US: 11–13

United Kingdom Size 15–17.5: Corresponds to a US shoe size range of 15.5–18, foot length of 32.5–35 $\text{cm}$ (12.8–13.8 $\text{in}$), and fit classification Max Volume / Bariatric & Therapeutic.

US: 11–13: Corresponds to a US shoe size range of 11–13, foot length of 28.5–30 $\text{cm}$ (11.2–11.8 $\text{in}$), and fit classification Relaxed / Comfort Stretch.