These are kind of a jeans/ trousers hybrid and are a 'slim version of the classic boyfriend'.
They are a 27inch waist as they are meant to be worn slung low on the hip, slightly baggy. I also think they work fitted and as a mid-rise... if you prefer to wear them like this then they would suit a 30 inch waist.
They're ever so slightly cropped on my 5'7" frame.
The fabric is a sort of woven cotton... deliberately aged/ worn in.
In great condition.