Made of natural willow,made by hand. These balls measure approx 2.36 inch in diameter. The size may slightly difference due to manul handmade. It's safe for your pet to chew, meet your pet's natural instinct to chew, at the same time, promotes clean and healthy teeth . These are fun play chew toys for your pet. Your pets may push, nudge, nibble, or chew these ball toy which helps release cage boredom.Package included 5 piece, great value pack