size 4 grey american eagle outfitters dress no materials tag, but it feels like cotton built-in bra! straps are adjustable and removable. the waist measures 13” across. the pit-to-pit measurement is 14”. from armpit to hem, it measures 25.5”. the straps can be anywhere from 9” to 17.5”. there are two small stains (shown) that could come out with spot cleaning.