59 x 29 x 6 inch wood skid. Just barely too long. I think if I moved the seat forward then maybe the hatch would have closed but I already packed the straps.
Thankfully I brought two. Hooked them to the rear car seat child safety anchor points and around the pallet. I used a small paracord tie down clip to hold the hatch closed. Clips right into the metal hook and lock. Cardboard just to protect the car fabric.
This will become a ramp for the shed I keep my XT250 in.