7 pieces + 1 door (suitable for toilet training, puppies, small dogs)

9 pieces + 1 door (suitable for cats and dogs, small and medium-sized dogs)

11 pieces + 1 door (can hold toilets, kennels, small and medium-sized dogs)

13 pieces + 1 door (sufficient room for movement, multiple pets)

15 pieces + 1 door (rich space, creating casual entertainment all-in-one)