The dog crate bowl with round bowl design can be used as a cage food bowl or cage water bowl.The cross lock design can be fixed to the dog cage, cat cage, ferret cage and other pet cage. This dog feeding bowl attach directly to the cage for easy feeding. Or you can use it as a basic bowl. There is a plastic fixed bowl and metal bowl in one set, you can also separate them into two bowls. Hanging stainless steel food water dog and cat bowl is removable for easy clean up, fill up or remove. You can make the plastic bow fixed to the cage and just remove the stainless steel bowl for cleaning up, fill up. It can be use to small dog, cat, rabbit, a bird bath for Finches Canaries Parakeets and other small birds. Please refer to our image for how to use the dog bowl on a pet cage/crate, if any help needed, please feel free to email to us, thank you. Large Size--The outer bowl size is 7.5 * 7.5 * 2.1 inch, The stainless bowl size is 5.8 * 5.8 * 1.9 inch Small Size--The outer bowl size is 6.3 *6.3 * 2.2 inch, The stainless bowl size is 4.5 * 4.5 * 2 inch