Litter Box Depth Table

How much litter do you need for the Fussy Cat Round Litter Box? Here's a handy table as a guide:

 Litter Depth Litter Volume
3cm 4.7 Litres
4cm 6.5 Litres
5cm 8 Litres
6cm 9.5 Litres
7cm 11 Litres