This site will show you the appropriate hamster cage you should get for your hammy and what other important items you should pick up when taking home your hamster.
A good hamster cage needs to be well-ventilated because hamsters can suffer from heatstroke during hot weather. With that said, avoid cages where the walls are made entirely of see-through plastic. They are literally green houses for hamsters. Instead, choose a cage that uses wires or mesh. This guide will introduce you to hamster cages that are well-built and affordable.