Cargo Van size

Here is an interesting question? What are the inner dimensions of a cargo van? We had to know these bec. we were planning to rent a cargo van to pick up our new sofa. I did some googling but could not come up with exact dimensions. After some efforts, I finally found a reasonable dimensions, here it is:

9 ft* 6 ft* 4 ft

Another tip: If you want to rent a cargo van, need to do early booking. U will not get a day before, need to reserve atleast couple of days ahead.