How big should a rabbit hutch be for one rabbit?

Specialist rabbit communities such as r/Rabbits consistently argue that pet store cages are too small and recommend at least 8 sq ft of enclosure plus several hours of run time daily. Two-rabbit setups should roughly double that. Larger 60"+ two-story hutches in this roundup get closer to that floor, while compact 30-40" cages are widely treated as supplemental space rather than primary housing.