The Fibonacciverse is verse, whose diameter is: (observeable universe diameter in light years)-th Fibonacci number in light years.
Which roughly estimates to = F93,000,000,000 = 101010.28 light years in diameter.
In the Fibonacciverse, objects can only be in the shape of the Fibonacci sequence.
Objects / particles / distances can only be a Fibonacci number in size / length / volume / area / angle, no exceptions.
Thus, anyone and anything who attempts to enter the Fibonacciverse, gets resized and reshaped (and possibly, stuck permanently).