Embroidered Multi Color Sleeveless Dress Asymmetrical Hem Size M

I bought this in Jamaica many years ago, just found it in my closet! Really pretty colors almost a tie dye effect, with embroidery around the hem and arms. It is asymmetrical, longer in front and back. 100% rayon. It says one size fits all, but I would say a Medium. It measures 20 inches across at the armpits. The arm opening is 10 inches. Brand new still with tags. Perfect for beach or beach party.