Material:TPR Color:blue,orange,green Size:Diameter 7.5cm Special: 1. The surface is protruded. When the dog bites, it can fully rub with the teeth. At the same time, it can not only rub the teeth and clean the teeth, but also help the dogs jaw muscles develop2. Your dog will see the difference A study by a famous university has confirmed that dogs are not color blind, but only limited color recognition. When the dog is happy, it can recognize the color target board, and the accuracy is amazing, so this ball adds visual intelligent design. Helps enhance the dogs visual recognition.3. A good toy for people to interact with pets Full of elasticity, you can hold it in your hand or throw it out for the dog to pick it up. The owners long-term interaction with the pet will help the pets intellectual development and healthy bone growth. Conversion: 1inch=2.54cm, 1cm=0.393inches Warm Tip : Please be reminded that due lighting effects, monitors brightness/contrast settings etc, there could be some slight differences in the colour tone of the websites photo and the actual item