1. Material: copper, rhinestones, imitation pearls, white K plating 2. Size: S/M/L 3. Length: S is about 20 cm, M is about 25 cm, L is about 30 cm, and the extension chain is 5 cm 4. Single weight: S is about 23 grams, M is about 26 grams, and L is about 28 grams 5. Application: Both cats and dogs 6. Features: unique shape, versatile personality, comfortable to wear, neck circumference can be adjusted appropriately, exquisite workmanship, not easy to fade, safe material, non-toxic and harmless