Rail Type Engine Transfer Trailer, 8000 lb rated

Bought a Rail Type Engine Transfer Trailer, 8000 lb rated. Can someone tell me exactly how big these are, will it fit in the back of a pickup or do I need to take my trailer to pick it up. I uploaded a picture of it - -
Thanks for any help

It's been a few years , but I don't think it will go in the back of a pick up.

They buck like a bronco at speeds over about 20 MPH, especially empty, so don't plan on towing it down the highway.

I doubt the tires are highway rated anyway. Flip it upside down and it should fit with some hangover.