Vintage 1960s or early '70s mini dress, seems to be handmade. Woven fabric in a bright psychedelic flower power inspired print, sleeveless with a back zipper. No size tag, best fits XS, see measurements.

Shoulders: ~14"
Bust: ~32"
Waist: ~28"
Hips: ~36-37"
Length: ~32"

For reference, model is 5'6" / 32DD / 25" waist / 38" hips and usually wears an XS. Dress is a bit short and a bit snug at the hips.