It depends. Some people only have one or two cars in their collector's garage while others will have over 10 or 20 cars in their collection.
Most are mot big enough and most are around 24x22. A much better size for a 2 car garage is 30x28.
What is average size of two car garage?
it depends on how big your garage is...
A standard 2 car garage is 24 ft x 24 ft. So you would double that for a four car garage.
Big enough to close the door.
The average with of an one car garage is 12 feet. Many people will want a few extra feet of width for storage.
Those dimensions would correspond to a two-car garage.
20 feet
Average, 24' + 30'
It depends - they can be diferent.
You can find such a remote at your local Home Depot. They have a couple of remotes that you can choose from.
on average 600 sf