This is for a normal home with a normal car truck suv or van parked inside.
Normal garage door height.
Double garage doors have a width of 12 to 16 feet.
For a shed the best size for installing a garage door is 8 x 14 feet.
Rv garage doors are taller with a height of 8 to 9 feet and width of 16.
Standard single car garage door widths start at 8 feet for single car garages and move up in 12 inch increments to 10 feet wide.
A garage will need backroom that equals the door height plus 18 inches and possibly more based on the installation of an automatic garage door opener.
Then the garage door would be 6 x 6 6.
Double car garage doors typically start at 12 feet wide and move.
Measure the backroom the distance from the garage door opening to the back wall of the garage.
2 a double door.
For a garage attached or detached from your house of around 18 x 24 feet most popular width for a garage door is 16 feet.
Well normal garage doors measure 8 x 7 feet 9 x 7 feet and 10 x 7 feet all around.
If you have an rv the door can go up to 10 feet.
Standard garage door sizes range from single doors to commercial doors.
As for the height it is 7 or 8 feet.
You should reconsider the specifications for your garage door if you have multiple vehicles or a large vehicle to park inside.
Use a step ladder to more easily measure the ceiling height.