THE NEW JERUSALEM WILL BE A 1500 MILE SQUARE, OR 2.25 MILLION SQUARE MILES. The interesting thing is that it is a 1500 mile three dimensional cube. Its length, breadth, and height are equal.
So if you think of it as a skyscraper that is 1500 miles high and 1500 miles square, you might get the feel for how big it really will be. Even if each floor is a half-mile high, the total surface area is larger than the landmass of the entire planet. And who needs half-mile high ceilings; our new bodies?
The point is, it will be big enough, and there is plenty of room for YOU to enter in, IF you will.