Dimensions of buddy seat pads?

Anyone got some dimensions of their buddy seats?

The ones that go between the seats or behind the passenger seats.
Any pads really, I have some foam I need to cut to the size of both.

Cheers in advance

 

Devon metal fold down buddy seat that hinges off the passenger bulkhead:
390mm W (across bulkhead)
340mm L (towards the rear seat)
60mm D (firm density foam)
radiused corners at front

 

Surely as big as the buddy gonna be sitting on it.

 

Devon seat on the box between the front seats.
Base pad 330 wide 510 deep. 90 thick at front 80 thick at rear.
Back pad 330 w 370 h and 50 thick at base 40 thick at top.
That is the outside dimensions of the originals I keep in the loft.