Originally Posted by furyshade
what do you mean the "size"? if the size is the total area of the universe then there is no problem, since that 13 billion years is essentially a maximum radius
No, that's just the size of the light cone. Some estimates put the actual size of the universe at 10^10^14 (miles, parsecs, feet, units don't matter at that scale). All we see is a teeny tiny little local patch, what was around us at the time of the Big Bang.