80% Nylon 20% Spandex Dress is very stretchy, swimsuit material. Would be great not only for swim, but for tennis, golf, or any other athletic activity. Measurements are approximate: Pit to pit is about 15 in. The front neckline to the bottom hem is about 29 in. Dress has an adjustable tie back for shoulder straps. Dress has a built-in, non-padded bra. Care tag has come loose from the seam slightly as seen in the photo. Dress is in great condition. No holes or stains. As seen in the last photo, there is a small thread that has come loose on one of the straps. Smoke-free home. Pet friendly home.