Big enough to close the door.
it depends on how big your garage is...
The width of a standard single-car garage door is typically 8 to 9 feet wide.
The standard width of a single car garage door is typically 8 to 9 feet wide.
Most are mot big enough and most are around 24x22. A much better size for a 2 car garage is 30x28.
With a 16' x 7' garage door you can get by with a 20 x 20 slab. 22 x 24 will of course be more comfortable...
Those dimensions would correspond to a two-car garage.
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Normal width of a single car garage is 8' feet. Normal width of a double car garage is 16' feet. These answers are for doors typically found in the USA.
It depends - they can be diferent.
The standard width of a double car garage is 20.5 feet. That is a big enough size to fit a large sedan and a truck inside.
You'll need to get a nonstandard garage door (not single-car width), so that may be very hard to find.
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