How many cats use the box?
1
2
3 or more
Is any cat a kitten, tiny, or older and stiff?
No, all healthy adults
Kitten or very light cat
Older or stiff cat
How does your cat react to new things and noises?
Curious, takes it in stride
Easily startled
What is the problem you want to fix?
Scooping is a chore
I'm away a lot
Smell
Your cat's length, nose to base of tail (cm)
cm
Space for the box
Roomy spot, easy to reach
Tight corner or small flat
A rule-of-thumb helper, not a verdict. Always check the maker's manual for minimum cat weight and age.