What about carrying a bike or watercraft too? If the box does overhang the windscreen it’s often not visible when in the front seats of the car. You’ll be surprised how visually roof boxes tends to shrink when actually on the car roof. Don’t worry too much about “overhang” either.For example we fitted an Alpine 2.3 metre roof box onto a VW Polo! In terms of size, you can fit practically fit any size roof box on any car.Some customers also use vacuum bags too – fill them up and then suck out all the air to reduce the size even further!
Ikea blue bags or the large zip up laundry bags seem to be popular.