1. Size: XS/S/M/L 2. Adjustable range: XS is about 10-18 cm, S is about 12-22 cm, M is about 16-29 cm, and L is about 19-36 cm 3. Recommended pet weight: XS is within 2 kg, S is within 5 kg, M is within 10 kg, and L is within 15 kg. 4. Single weight: XS is about 40 grams, S is about 65 grams, M is about 105 grams, and L is about 150 grams 5. Material: cotton, filled with PP cotton 6. Application: universal for cats and dogs 7. Features: exquisite printing pattern, soft docile, comfortable to wear, free movement, inner ring can be contracted and adjusted, material is safe and odorless, versatile, durable