1. Material: artificial leather 2. Weight: about 20g/piece 3. Neck circumference: S is about 20-25 cm, M is about 25-30 cm, and there is a 5 cm extension chain at the back to adjust 4. Application: cats, small dogs, rabbits, etc. 5. Features: unique shape, exquisite workmanship, soft and comfortable, elasticity can be adjusted appropriately, easy to wear, safe material, durable