This is a beautiful Lululemon rose print racer back tank! It has a silky feel and trendy cutouts along the straps and down the strap in the back. There is not a size tag or dot, but it fits like a Small. Probably a Lululemon 4? See measurements.
Armpit to Armpit: 15in across Length: Front 25in Back 26.5in Waist: 18.5in across bottom hem