Elegant Black and White Patterned Dress

Floor length sundresss purchased from Urban Outfitters over 10 years ago, worn once. Features a geometricric pattern in black and white with a cutout on each side of ribs and two slits on each side of leg that go up to the knee area (give or take).. two buttons clasp behind bra line and a black zipper on lower back. Light, breathable material. Comfortable, but no stretch at waist. Measurements in pics.