Indonesian tie dye-type sundress

The most comfortable fabric for hot and humid summer days is rayon challis, the fabric of this item. V-neck with adjustable spaghetti straps, w/a gathered back and bodice. I don't recognize the label, but I do know that this type of dress & fabric is the best for tropical weather. The size tag says "One size." Here are the measurements to the best of my ability: Pit to pit: Approx 15" laid flat to approx 19.5" stretched out Back length: 26" All measurements are approximate