My cheapo stat bike is just a set of pedal, with enough elctronics to estimate my caloric consumption. fully extended, it has a footprint fourteen inches by 21 inches. (I measured it, just for you) It folds up even smaller; cost less than 30 bucks.

It replaced a more elaborate and much bigger stat bike that did take up much more space; cost at least $2000, but it was a gift from my wonderful BIL.

I hve gotten a lot of use with dovid, hip replacement, and Cal's recent air quality issues