Unfortunately, there is no standard size for a dock door. The most common size is probably 8 feet by 9 feet, but many dock doors are both larger and smaller. Doors are usually between 8 and 10 feet in height, but even this doesn’t include the full scale of options. Some doors might be as tall as 12 feet. Likewise, width is often about 8 feet, but doors may be as narrow as 7’6” or as wide as 10 feet.  When deciding on the right loading dock door size, consider the requirements for the trucks you will use and the cargo you work with.