The overall outside dimensions are
76" wide x 31" deep x 88" high.

The height of the lower section is a little over 45"

I use 3" swivel wheels on one end
and 3" fixed wheels on the other end
so one person can steer them.
I like them this way,
others in my shop prefer all the wheels to swivel
so we have some each way.

Dave Macfee