As size of cars is increasing, the size of doors also needs to be increased. Bigger garage demands bigger doors. Some manufacturers design doors according to buyer’s preference, but some dedicatedly stick to standard. A standard door is also called golf cart door. They are available in three sizes; 5X7 feet, 6X7 feet, 8X7 feet. While doors for single cars… More on this story here.
https://www.eurodita.com/standard-garage-door-sizes-available/