Gap Midrise True Skinny jeans in Black Rinse size 4/27

Stretchy mid-rise skinny jeans in a black color with faint whitish marks at the bottom of both legs. Unclear if this is factory-done or happened in the washing machine, but it is on both the front and back of both legs, so I think it is intentional. See photos. In good used condition. Approximate measurements from flat lay: waist: 13.5" rise: 9" inseam: 28"