Lululemon Go Steady black racerback sports bra. Size 4, the tag is missing but the interior has one size bar which indicates it's a size 4. It measures 9 3/4" long and 10 1/2" pit to pit. It's great for a B-C cup. Soft breathable material with medium seamless support, no pads. It also has hook and eye adjustable back. In great preowned condition.