Zella vibrant red racerback tank with built-in support. Tank itself is a size medium. The built-in bra has two removable pads inside labeled for bra size 34B. Smooth, stretchy performance fabric. Streamlined fit for workouts or layering. Easy-care material. Like new condition, I think I might have worn one time. Armpit to armpit 14.8” Length 24.6”