Most garage doors are 8 feet by 7 feet or 9 feet by 7 feet. The size of the doors is dependent on the home and what will be stored in the garage.
Garage doors come in many different sizes. A garage for a single car may only be 8 feet by 7 feet. If the space is bigger or larger things will be stored, a larger door may be needed. A double car garage may have a door that measures up to 16 feet by 7 feet. Even larger doors are available if an RV or commercial vehicle is going to be stored at the residence. Whichever size door is chosen, make sure it accommodates all vehicles being able to get in and out easily.