1. Material: plastic 2. Weight: about 103g/piece for small size, 235g/piece for large size 3. Size: small size is about 17.5x5.8 cm/piece, large size is about 25.3x7.8 cm/piece 4. Applicable objects: both cats and dogs 5. Features: unique shape, beautiful and exquisite, safe and healthy material, smooth inside, easy to clean, stable placement, durable