United Kingdom Size 16–18 to US: M (8–10)

United Kingdom Size 16–18: Bust interval range of 97.8–104.1 $\text{cm}$ (38.5–41 $\text{in}$), natural waist range of 76.2–82.6 $\text{cm}$ (30–32.5 $\text{in}$), shoulder width of 41.3 $\text{cm}$ (16.25 $\text{in}$), sleeve length of 80 $\text{cm}$ (31.5 $\text{in}$), style variants Blouses, T-Shirts, Tank Tops, Sweaters & Cardigans, and fit classification Relaxed Comfort Fit.

US: M (8–10): Bust interval range of 91.4–96.5 $\text{cm}$ (36–38 $\text{in}$), natural waist range of 69.9–74.9 $\text{cm}$ (27.5–29.5 $\text{in}$), shoulder width of 39.4 $\text{cm}$ (15.5 $\text{in}$), sleeve length of 78.7 $\text{cm}$ (31 $\text{in}$), style variants Blouses, T-Shirts, Tank Tops, Sweaters & Cardigans, and fit classification Classic Regular Fit.