The Anthropic Principle and the Weinberg Argument for Answering the Great Mystery

The rate of nucleation dominantly depends on the size of the extra dimension. So if the extra dimensions are too large, it becomes too difficult for this process to take place. And is the condition that the curled up dimensions are like your tiny circle that's added to the spacetime at every point? What those circles have to be the low sum size threshold? Is that the idea or above or how does that work?