They are commonly known as being Dwarf Hamsters because of their small size. They have a lifespan of about 2.5 to 3 years, and a fully grown Chinese Hamster reaches an adult size of about 4 inches. This makes them small enough to escape through some hamster cage bars.
You want to pick a cage that is a good size, escape-proof, safe, and easy to clean. Unfortunately, many cages you will find at the pet store do not meet all these requirements when it comes to dwarf hamsters or Chinese hamsters since they are much smaller than their larger Syrian hamster cousins.
Because of their diminutive size, Chinese dwarf hamsters can often escape from wire cages. Opt for an aquarium-style tank or a tight-locking plastic commercial house to keep your hamster safe and secure.
When you purchase a Dwarf hamster, whether it is a Chinese, Robo (Roborovski dwarf) Campbells or Winter White dwarf (collectively, and incorrectly called 'Russian Hamsters' or 'Russian dwarfs') you must choose a cage that suits your pets needs, always bearing in mind its small size.
Also note that for a Chinese hamster, I also recommend any cage from the Syrian section, especially the Imac Fantasy. Chinese are the only dwarf hamsters able to climb tubes. Housing for Single Dwarfs.