Once you have your cat's neck measurement, add about 2 to 3 inches for a comfortable fit. This will give your cat some room to grow and allow you to easily adjust the collar.
For reference, here are some approximate collar sizes based on cat breeds:
Small cats: Small cat breeds, such as Siamese or Abyssinian, typically have neck sizes of around 7-10 inches.
Medium cats: Medium cat breeds, such as Maine Coons or Birman, typically have neck sizes of around 9-12 inches.
Large cats: Large cat breeds, such as Ragdolls or Norwegian Forest Cats, typically have neck sizes of around 10-14 inches.
It's always best to measure your cat's neck to ensure the collar fits comfortably and safely.