XS（15-20cm）【Suitable for kittens, puppies, teacup dogs, etc.】
S (20-25cm) [suitable for growing cats, cats within 8 kg and small dogs]
M (25-30cm) [suitable for cats over 10 kg, Teddy, Bichon, etc.] L (30-35cm) [suitable for fat cats, medium-sized dogs, etc.]