The size of the litter box for a Persian cat is an important consideration as it affects their comfort, hygiene and overall use of the litter box. It’s recommended to get a litter box that is big enough for your cat to move around comfortably and do their business without feeling cramped or cramped. Here are a few factors to keep in mind when choosing the size of the litter box for a Persian cat:

1. Cat Size: Persian cats are known for their long, flowing coats and majestic appearance, and they’re also typically medium to large sized cats. They require a litter box that is big enough to accommodate their size, allowing them to turn around comfortably and move freely. A minimum litter box size of 18 inches long, 14 inches wide, and 5 inches deep is recommended for a Persian cat.
2. Space: It’s important to consider the space you have available for the litter box. A larger litter box will take up more floor space, but it will provide your cat with more room to move around and do their business. If you have limited space, consider a corner litter box or one with a low profile to save space.
3. Litter Type: The type of litter you choose can also impact the size of the litter box you need. If you use clumping litter, a larger box will provide more space for the litter to clump and prevent spillage. Similarly, if you use a deeper litter depth, you’ll need a larger box to accommodate it.
4. Multiple Cats: If you have multiple cats, it’s important to provide a litter box for each cat, plus one additional box. This will ensure that each cat has access to a clean and spacious litter box, reducing the risk of litter box avoidance behavior and other litter box-related issues.

In conclusion, the best size of the litter box for a Persian cat is one that is large enough to accommodate their size and provide them with enough room to move around and do their business comfortably. A minimum size of 18 inches long, 14 inches wide, and 5 inches deep is recommended, but it’s important to consider other factors such as the type of litter you use, the space you have available, and whether you have multiple cats.