Marinette is a half French (by her father's side) and half Chinese (by her mother's side) teenage girl of average height with medium-length black hair with blue reflections that is always seen tied back in two pigtails, bluebell eyes^[58][59], light freckles on both sides and the bridge of her nose.
In "Heart Hunter", when Marinette loses her hair ribbons, the full length of her hair reaches her shoulders.

Civilian attire

Marinette wears a dark gray blazer with rolled-up sleeves; the inside of the blazer is lined in white with pink polka dots and it has black trimming. Underneath, she wears a white t-shirt with black stitching and a flower design below the collar. The design itself has pink flowers and black leaves. She wears pink rolled up jeans and pink ballet flats with dark red soles. She wears eyeliner around her eyes and sports black earrings that also serve as her Miraculous when Tikki inhabits them. She often wears a light pink purse with a thin black strap over her right shoulder.

https://www.planetminecraft.com/skin/marinette-dupain-cheng-4428938/