Lululemon Athletica Top

Pretty purple cropped sports bra top with iconic Lululemon logo. Ideal for active wear. In good used condition. Purchased at a Poshmark auction and thought it would fit me as a size medium. However, it is too tight. It measures 14 inches across laying flat at rest, and stretches to 16 inches. Built in shelf bra. There is no size tag or fabric tag.