Potage's Cauldron Shop sells different varieties and sizes of cauldrons, including copper, brass, pewter, silver, self-stirring, collapsible, and solid gold, according to a sign outside the shop. Hogwarts requires its students to have a size 2 pewter cauldron (as listed in the Philosopher's Stone book list). The Cauldron Shop is very near to the entrance from The Leaky Cauldron.
