The Petulia's bowl measures 3" High and 5" Diameter. These bowls have the look, feel and weight of glass but all the safety and convenience of plastic. It has a very hard, non-porous surface so it is difficult to scratch. It is comparable to ceramic, glass or steel in terms of food safety. Our material has been tested and approved for food safety contact for humans. Believe it or not, there are no testing regulations for pets. Since it is safety-approved for humans, we're confident it is good for our pets.