Sorry about delay Steve,, I just forgot to do it!!
16.5" to top of canopy, depending on how high a load can be heaped up that's the minimum height clearance.
24" wide gives me about 2" clearance on either side for width
Over all length is 3'. The bed is just under 24" long without canopy. And sharp rocks being dumped in will be good, put some wear scratches in her!!