🦋Algo fitted sundress

Thick, slightly stretchy cotton blend(?) material. Straps are adjustable with two button holes and can be worn crossed at the back or straight. They have been sewn in the front to make them shorter (see last pics). Sweetheart neckline. Two small rust stains (one on back strap and one on front-see pics). It has been washed, not sure if they will come out or not. Hardly noticeable. I had to search for the front one. No size listed, was given to me by a friend 31” bust to hem 15.5” waist 17” bust