This gently used composter is roughly 3 feet high and 2x2 feet at the base. It's well reviewed on Amazon. Fully assembled, though the stand can be quickly removed for easier transport.
https://www.amazon.com/FCMP-Outdoor-IM4000-Composter-Canadian-Made/dp/B0093...
Tumbling Composter (San Rafael, Near Gerstle Park)
This offer has been gifted to someone and is no longer available.