The black lacy thing is... lacy. And small. The straps are tiny little slivers on her shoulders. The neckline that doesn't quite plunge but devolves into pure lace just above her areolas. It's short, which Hermione thinks will actually be helpful in hiding it under clothing, but it barely covers her arse, and what is there is also nothing but lace. She gulps, stepping back into the heels she's been wearing all day, and blanches at the mirror as she turns around to look.