- Chest circumference: Measure the widest part of your cat's chest, just behind the front legs.
- Neck circumference: Measure around your cat's neck at the base.
- Body length: Measure your cat's length from the base of the neck to the base of the tail.
Once you have taken these measurements, you can compare them to the size chart of the harness you are considering purchasing to find the best size for your cat.