Fits
| L-4 | "Standard" adult-sized cats |
| L-5 | Long and tall, Ragdoll, high-urinating cats |
| L-5-S | "Standard" to long-is cats |
| L-6-S | Long cats, multi-cat household |
| L-6-M | Long and tall cats, multi-cat household |
| L-6 | Extremely Long and tall, Maine Coon, high-urinating cats, excessively large for "standard" adult size cats |