For your home garage the perfect size starts from 2.6 gallon to 20 gallon and max PSI of 135, this all depends on the requirement of your garage.
Therefore, the compressor you choose is really dependent upon the type and number of air tools you will be using.
If you buy between these sizes you will be able to do tons of work at home. This can be used to inflate tires, use all kinds of power tools (impact wrench, nail gun, paint sprayer), winterizing and much more.