NWT vintage Spiegel knee length black career skirt size 12

Knee length black skirt with two-button waist and zipper closure. 97% cotton, 3% lycra, so has some stretch to it. Vent/slit in the center of the back. Hip pockets in the front. Approximate measurements from flat lay: waist: 16.25" length: 22.5" slit: 5.5"