Robin,
Just popped out with the tape measure - all measurements inside the car with both doors shut (there is no intrusion from the rear armrests etc over the seat cushion). All of the belt release distances are to/from the centre of the release pads for consistency. As accurate as I could be, but possibly a few mils either way.
Back cushion is 25" (63cm) high - not including headrests.
Bench cushion is 55" (140cm) wide and 20" (51cm) deep.
The distance from either offside/nearside belt releases is 19.5" (50cm) to their respective cushion edges.
The centre belt release is 16" (41cm) from the nearside belt release.
Hope that all makes sense.
Welcome to test fit in mine, but finding time over the next week or so may be challenging. Where abouts are you?
Have you seen a particular Croma for sale you are interested in?
Bob