Athleta Racer Back Sleeveless Tank Built-in Bra Athletic Tank Size M? - See Measurements The size tag is not clear (see pics) so please verify your size by measurements. I am guessing at size Medium. The bra section is a fit of A-C. The top is otherwise in nice preowned condition with lots of life left. Measurements: Pit to pit - 14.5" Pit to hem - 17" Waist - 15" Hips - 18" Down back middle - 24" Material: Outer Body - 55% nylon, 40% polyester, 5% spandex Inner Body - 88% polyester, 12% spandex Bra Cup - 92% polyester, 8% spandex Bra Panels - 87% nylon, 13% spandex 4-807