The depth of a utility sink can range from 8 inches to 24 inches. The size that you select will depend on the space available in your garage and the planned use. For example, if you have mid size dogs and you plan to give them a bath in the utility sink, then you should be picking a utility sink that is 24 inches deep When installing the utility sink in your garage make sure that the top of the sink is chest high. For a deep utility sink, try and keep the bottom of the sink waist high.