I have a cage that is 2x(3 and a bit, three and then 5 extra little squares) as thats the only thing that will fit in my space, however it is connected with the actual connectors, (accept the extra pannels on the end) and when you measure the inside it DOES meet the minimum requirments. It was 2x3 when they were little, but it got to small so i expanded as much as i physically could. I have never had a problem with it, but i have addded a hay loft so they can get away from eachother. (they also have floor time every day)