The average with of an one car garage is 12 feet. Many people will want a few extra feet of width for storage.
Generally 8' or 9'
8 or 9 foot, either one is common.
The average length would be 24' but bigger is always better.
It would depend on the size of the one car garage and garage door opening.It depends on the size of the garage. Not all one car garages are the same size.
For your answer, I suggest you go to:http://www.apmbuildings.com/onecargarage.shtml
A one car bay garage is usually a free standing structure with room for one car. They can be attached to a house.
one car width
A parking area for one car inside a garage.
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.
a metal one.
The location (country) is more important than the appearance.
20'