REEBOK Black Razor Back Black Tank Top Stretch

Reebok racerback tank top in black. Added interest on straps and back panel. Lightly padded bra w/ underneath stretch band. Size label is missing but approx. measurements are: Underarm seam to underarm seam 16" stretching just slightly Across back underarm seam to seam 14 1/2" w/o stretching Length from underarm to bottom front 15 1/2" Back to bottom center 21 1/2". I've chosen medium as a guess based on other pieces., This is just an estimate. Clean w/no damage from a smoke/pet free