For size reference was modeled on a small mannequin. Free People Intimately lacey bra top with ruffles around the bottom, adjustable double straps that crisscross in the back. Viscose, nylon and cotton, wide elastic band in the back, this is the only stretch. Size medium, across the back band is 13 1/2", but stretch is much more. Cherry red and ready for the holidays, or anytime to add a pop of color to your outfit. Nice with just a touch of naughty!