Size of the ring does not matter,Floyd would back away,fight on the outside and that would be perfect for Hearns to land the looooooong jabs and that rocket of a right hand. Floyd does not have the power to keep Hearns off at all and that was HeArns only weakness,a slightly suspect chin. He could box,he could brawl and so what if he went to war with Floyd,I really don't see Floyd hurting him or stopping him coming forward. Hearns would be too big,too strong and would bully Floyd and beat him. In fact,the Hitman would KTFO all these current WW!!