Girls Small YSM Under Armour Heat Gear Workout Athletic Running Gym Sports Bra. Nice solid Turquoise Blue toned ~ Black/Gray base banding ~ Yellow Logo insignia graphics. 
 Lying flat across base Measures approx. 10" left to right side (totaling 20" all around including both front & back, unstretched); top shoulder to base is 9". Soft stretch 100% Polyester.

Good preowned condition: see photos, varied angles/both sides.  Minimal typical usage wear, Daughter simply outgrew. 
Smoke-free home.