The uniform skirts they wear always get shorter as the girls get taller, of course, legs growing longer and all that. Granger’s haven’t. She’s short, a short witch. She barely comes to Draco’s chest. But that’s made the glimpses of skin above her knee that much more tantalising, because they’re rare. Girls like Pansy and Daphne tug theirs up just a smidge when they sit, a subtle motion meant to escape the professors’ eyes but never the wizards’. Granger doesn’t. She tugs hers down, just covering her knee with her legs crossed.