so essentially the answer is any mid-size (ie in the mondeo, passat etc size) estate
Some cars turn out much smaller than you’d think- especially protruding wheel arches make a huge difference to how much you can carry, and how easily.
The Focus is huge because it has a low floor and also a full width bay, so you can stack it tall and wide, and use every inch . I had an Avensis hire car and it was almost as wide, just as long, but much less tall and that made it not just smaller, but less good at dealing with awkward shaped objects. The Focus is nothing amazing- it just takes all the tricks available to make a small car large, and uses every last one of them.
Raised boot lips make a surprisingly big difference too- not in capacity, but in how easy it is to use it. You can really ram stuff into a car with a flat boot exit and it’ll always come back out but when it’s got to be lifted out, things can get a bit crystal maze.
If you look at, say, a Volve V40, it’s uncanny how little boot space there is.