Vintage lightweight gauzy rainbow tank🌈

Vintage summer crop tank with a keyhole back detail and adjustable straps, material is soft and gauzy. Possibly cotton, but there are no tags so I can’t be sure. I’d say it fits XS-S best, maybe a M but please check the measurements to ensure best fit Bust pit to pit - 16-18” Length top of strap to hem- 17” No noticeable flaws. Super cute for a pool day!