Generally when one has rabbits as pets, their time gets divided between running free in the house and being in their cage. Hence if your rabbit is spending more than half its life in the cage, you should do your best to ensure that it is comfortable enough. There are a variety of rabbit cages available in the market, however many of them do not make for suitable enough homes for your pet. Most of the ones available are way too small; others may come with wired floors, which are not really comfortable for your little bunny rabbit.
Deciding how big a rabbit cage should be is simple. The bigger the cage is, the better it is for your rabbit. However the minimum requirement for a rabbit cage size is that it should be four times the size of your rabbit. Depending on this, you can get any cage which meets your other practical requirements.