How to Choose a Cat Litter Box: Size, Sides & Design

Choose a cat litter box that lets your cat enter, turn, dig, and cover waste without pressing against the walls. Start with usable interior space, then consider entrance height, side height, privacy, airflow, and your cat’s mobility.

By the MICHU Product Team · Updated August 7, 2026

Quick litter box comparison

Cat or household need Useful box feature Why it helps
Large cat Extra-large interior floor area Provides room to turn and position comfortably
Enthusiastic digger High sides Helps contain kicked litter
Cat that urinates near the edge High back and side walls Helps keep waste inside the box
Kitten, senior, or mobility-limited cat Accessible entrance Reduces the step required to enter
Privacy-seeking cat Semi-enclosed design Adds visual privacy while retaining an open entrance
Multi-cat home Multiple boxes in separate locations Reduces competition and provides more choice

What size litter box does a cat need?

A practical starting point is a box about one-and-a-half times your cat’s body length, excluding the tail. This is a guide, not a strict rule. Your cat should be able to turn freely and dig without repeatedly stepping outside the box.

Labels such as “large,” “XL,” and “XXL” are not standardized. Compare usable interior floor space and entrance dimensions instead of relying only on the product name.

Open vs high-sided vs semi-enclosed litter boxes

Style Main advantage Important consideration
Macaron open-top litter box Airflow, visibility, and easy scooping May allow more kicked litter to escape
XXL BoBa high-sided litter box Scatter control without a roof Entrance height must remain accessible
Castle semi-enclosed litter box More privacy and some scatter control Needs regular cleaning and good ventilation
XXL bamboo lid option Flexible setup for the home Confirm your cat remains comfortable using it

Best litter box for a large cat

Large cats benefit from generous usable floor space and stable walls. The cat should not need to curl tightly or stand with part of its body outside. Explore MICHU cat litter boxes or read our guide to extra-large and high-sided litter boxes.

Best litter box for kittens and senior cats

Prioritize an entrance the cat can step over comfortably. A box can have high back and side walls while still offering a lower entry point. Keep the route clear and place the box where the cat can reach it without stairs or obstacles when mobility is limited.

How many litter boxes do multiple cats need?

A commonly used starting point is one box per cat plus one additional box. Place boxes in separate, accessible locations rather than treating several boxes side by side as fully separate resources. Individual cats may need a different arrangement.

Where should a litter box be placed?

  • Choose a quiet, accessible, and ventilated location.
  • Keep the box away from food and water.
  • Avoid dead-end corners where another pet could block access.
  • Keep the route available at all times.
  • Avoid sudden appliance noise if your cat is easily startled.

How to reduce litter scatter and tracking

  • Choose enough floor space so your cat can dig away from the entrance.
  • Use high sides for vigorous diggers.
  • Maintain the litter depth recommended on the package.
  • Place a textured litter mat across the main exit path.
  • Pair the box with lower-tracking cat litter when the texture suits your cat.
  • Scoop daily so clean digging space remains available.

How often should a litter box be cleaned?

Remove solid waste and urine clumps at least daily. Top up litter as needed and complete a full empty-and-clean cycle according to the litter directions and household usage. Use a pet-appropriate cleaner, rinse thoroughly, and dry the box before refilling it.

Frequently asked questions

Do cats prefer open or covered litter boxes?

Preferences vary. Many cats value space, cleanliness, and easy access more than a roof. Offer an alternative if your cat avoids a covered box or appears cramped inside it.

Can a litter box be too big?

For most healthy adult cats, extra usable space is helpful. Practical limits include placement, stability, and whether the entrance remains accessible.

Why does my cat kick litter out of the box?

Digging and covering are normal behaviors. Scatter can increase when the box is cramped, the sides are low, the litter is very fine, or the cat digs enthusiastically.

Should litter boxes be placed next to each other?

Two boxes side by side may function like one toilet location from the cat’s perspective. In multi-cat homes, distribute boxes so cats have separate access and exit routes.

What litter depth should I use?

Follow the litter manufacturer’s instructions. Different textures and automatic boxes may require different fill levels.

Complete the setup with MICHU tofu and plant-based cat litter.