X-Small fits paws 2"L x 1 3/4"W Small fits paws 2 1/8"L x 2"W Medium fits paws 2 1/2"L x 2"W Large fits paws 2 5/8"L x 2 1/2"W X-Large fits paws 3"L x 2 1/2"W

Teacup		Five pounds or less
XX Small		Five to Ten Pounds
X Small		10 to 25 Pounds
Small		20 to 45 Pounds
Medium		40 to 60 Pounds
Large		55 + Pounds