1970s Gunne Sax dress

1970s Gunne Sax tiered floral maxi dress. Beautiful style and silhouette with lace trim and waist tie. Tagged a size 5, and fits XXS, no give in the waist and bust. Im suspicious about it having been taken in. Pictured here on my size 6 dressform, unable to zip in the back. Pit to pit - 14” Waist (flat) - 12” Shoulder to waist - 14” Waist to hem - 38” 65% polyester / 35% cotton / lining: 100% acetate $195 plus shipping