Madam Malkins' Robes for All Occasions

Madam Malkin's is a clothing shop next to Flourish & Blotts. It sells wizarding robes, including the standard Hogwarts-required plain black work robes, and dress robes. Madam Malkin, a squat witch known to wear mauve robes, and her assistants will tailor the robes to fit right in her shop.

Harry Potter has two meetings with Draco Malfoy in Madam Malkin's shop. This is where Harry meets the first wizard of his own age, Malfoy, for the very first time in Philosopher's Stone. Harry is rather bewildered by the questions Draco asks, as Harry is still unfamiliar with so many aspects of the wizarding world. A second meeting occurs just before the beginning of Harry's sixth year, in Half-Blood Prince, at Hogwarts.

Malkin is an archaic term for a crotchety old woman.