Vintage 60s Blue Sailboat Pattern Button Down Dress

Vintage Union made in USA button down dress in blue with pink and green abstract sailboat pattern. Pink buttons. Elbow length sleeves have elastic. Pointed collar. Material is 100% polyester and stretchy with a slight sheen. Looks good loose or belted. Vintage size 20 1/2- approximate measurements pit to pit 23”, length 42”, sleeve 18”