Vtg ST JOHN for Saks Fifth Avenue Short Puff Sleeve Sweater Dress

Vintage ST. JOHN for Saks Fifth Avenue Black Santana Knit Short Puff Sleeve Sweater Dress Women's Size Small? No size tag. See measurements. Dress has flat slit hip pockets. Pleated panels at inner edges of sleeves. Measurements: Bust: 13.75" pit to pit across the front; Length: 39" from shoulder seam to hem; Waist: 12.75" across seam across the front. Excellent vintage condition. No stains, rips or tears. Size, material and care tag is missing. See measurements and pics.