If for a reason you need to keep a close eye on your pet cat and keep it locked, here's a selection of indoor cat cages. They vary in size and materials used and some of them are multileveled for even more space.
Bloom Cat Cage
This cat cage is available in two color options to choose: petal pink and powder blue. It includes movable plastic perches, a removable bottom for easy cleaning, and four locking casters.
A foldable, caged playpen equipped inside with three large plastic shelves covered with brown mat. It has four lockable, removable wheels and two doors with a safe latch closure. It was designed to create a peaceful environment for up to three cats.