70s Vintage Twinset Dark Blue and Gold Knitted Tank and Cardigan size small

Booth Bay vintage 1970s Knitted tank and cardigan set navy blue with metallic gold detail. Striped vest with scalloped edges. Long sleeve edge to edge jacket (non fastening). Excellent condition Please see measurements -size says Medium but measures more like Small. Material is stretchy pit to pit unstretched is 16”. Waist is 12” across unstretched , comfortably stretches to 13.5”.