Model 2 wears an L. She is a size 12-14 and 174cm tall.
We always recommend using your measurements to find your perfect fit. Number sizing differs so much between brands that it's difficult to calculate on that alone. In our experience if you are between sizes or unsure then it's best to size up.
Every size in every one of our products has been tried, tested and tailored on real bodies—we don't just 'upsize' our patterns to include plus size.