60s shift dress, sleeveless, floral print L

True vintage 1960s sleeveless shift dress with boat neck. Fully lined. Nylon zipper. No care label. I hand washed, air dried, and steamed it. No label identifying the fiber. A burn test indicates it’s synthetic or a blend. The mannequin’s measurements are 34/26/36, with a B cup. The dress is too large for her. Pit to pit flat measure 22 1/4” Hips flat measure 22 1/4” Length from inside of shoulder 42.5” The woven fabric doesn’t stretch. Very good condition. No tears or stains. From a smoke free and pet free home.